Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af19cd4905dd9ac…

MALICIOUS

PDF

333.1 KB Created: 2022-04-03 23:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 549344943e2a578942f0566204a5e455 SHA-1: 49e598bdb9fa424448b57709740edd91cf6c0e1c SHA-256: 4af19cd4905dd9ac4907476c561a3634985ce0bc6a8adf8fa143f03b19a7d74c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and multiple external links, including one identified as a 'free-download phishing' lure. The primary link redirects to a URL hosted on a compromised WordPress site, suggesting an attempt to deliver a phishing payload or redirect to a malicious site. The ClamAV detection and ML classifier further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5565

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yubit.co.za/XSRYdR1H?utm_term=reading+task+cards+ks2 PDF link annotation
    • https://relaxbotanika.cz/ckfinder/userfiles/files/99465897888.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/67647593840.pdfIn PDF document text
    • https://actorconseil.com/files/file/63654242040.pdfIn PDF document text
    • http://www.bash.cl/media/file/22159600951.pdfIn PDF document text
    • http://ghanzi.net/kcfinder/upload/files/laluverugu.pdfIn PDF document text
    • http://allasclub.com/campannas/file/lalikizifonujufaboz.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/49955629131.pdfIn PDF document text
    • http://shasenconsulting.com/assets/ckeditor/kcfinder/upload/files/regezetexeni.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16205a87007c12---bulawoz.pdfIn PDF document text
    • http://stoffelhoevetegelkachels.nl/userimg/file/manipenawazipuro.pdfIn PDF document text
    • http://0851gay.org/userfiles/202202file/2022020702232670554.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/tulasibikepufusamisikuj.pdfIn PDF document text
    • http://lk-atomexpo.ru/web/js/kcfinder/upload/files/gurawapuvawudebewefivupu.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/96612992843.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/rutejex.pdfIn PDF document text
    • https://fileduwefevara.weebly.com/uploads/1/3/4/3/134384607/zaruzirurobi.pdfIn PDF document text
    • http://bep-au-cong-nghiep.theonejsc.com/userfiles/file/65850098009.pdfIn PDF document text
    • https://www.cistarekaupa.cz/kcfinder/upload/files/tamaven.pdfIn PDF document text
    • https://voloxamofe.weebly.com/uploads/1/3/0/8/130874475/71dc916bf36a8.pdfIn PDF document text
    • https://kutinimi.weebly.com/uploads/1/3/4/6/134608846/kegiwusosagi.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/kanufajixi.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/38087164288.pdfIn PDF document text
    • https://botironolimuvot.weebly.com/uploads/1/3/1/3/131380397/ritorozafer-vupuje.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/ec0250c93794d28d6de3968e95a80a30/36138450239.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/9902466180.pdfIn PDF document text
    • http://isleford.com/filespath/files/20220319235133.pdfIn PDF document text
    • https://balurghat.offbeateducation.com/uploads/imagefile/14032257667.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1622c6d5d189f6---pamigotodugomeb.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/kabeme.pdfIn PDF document text
    • https://jeriturutokabi.weebly.com/uploads/1/4/1/3/141303118/4818901.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/jivatiris.pdfIn PDF document text
    • http://hajostanfolyam.hu/admin/kcfinder/upload/files/84654708214.pdfIn PDF document text
    • https://mebuduwo.weebly.com/uploads/1/3/1/4/131453299/9854950.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/ripitupomebizebuwifukezu.pdfIn PDF document text
    • http://tencanpowder.com/d/files/juxudulev.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/kilazezurutis.pdfIn PDF document text
    • https://muverepifakapi.weebly.com/uploads/1/3/5/3/135387058/5a4e332805b.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/27094292347.pdfIn PDF document text
    • https://migivijebejod.weebly.com/uploads/1/3/4/0/134017877/4356553.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/dobobitowunenufu.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202204022246021337.pdfIn PDF document text
    • https://softnettechno.com/sribati/editor/uploadfiles/raxarepemerixirawutini.pdfIn PDF document text
    • https://bovabesizepin.weebly.com/uploads/1/3/1/3/131383515/1ed47c1695.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    +2 more URL(s)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004c2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0004dade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DADE 10636 bytes
SHA-256: 334c3a49417cb523695e6a92a84f032270d656628671a946af2d5383db3e6b1e
font_02_sfnt_off0004f331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F331 18712 bytes
SHA-256: a7ed4b4338af1e4b8527f11ab8fd8a4f46f18670f3fc27b9857f29f925767a9f