Malicious PDF — malware analysis report

Static analysis result for SHA-256 4454f7b10fab2df6…

MALICIOUS

PDF

329.8 KB Created: 2022-02-08 16:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-11
MD5: 8c69ef33b1ff9c04b402bfbd4ba4d04d SHA-1: c134032de4ae2e214a5c087ac520f5e0b4933659 SHA-256: 4454f7b10fab2df6d7d82dcdb8ae4c0c93b9894d2b51ed240bec94116521b01c
182 Risk Score

Malware Insights

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

The sample is a PDF document that employs a fake invoice lure, aiming to deceive users into clicking a malicious link. The embedded JavaScript and the high-risk heuristics indicate that the PDF is designed to redirect users to phishing websites, as evidenced by the URL pointing to a compromised WordPress upload storage. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6414

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://cafij.co.za/XSRYdR1H?utm_term=behavioral+interview+answers+for+administrative+assistant PDF link annotation
    • http://www.clc-engineering.com/siteuploads/editorimg/file/figufabapesofevev.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/1960848091.pdfIn PDF document text
    • http://scoutpate.de/userfiles/file/93003147338.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/52671454730.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/89042121095.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616a5e47b9653---62731859713.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/dulolimopagi.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79294695558.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/dijuvanilixifedidilanugob.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/xorofimapefozuxidofile.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/67141400588.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/pisubiruvulevewinara.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/wufeb.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/jovitobemavukaxowufowo.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/joxozawazev.pdfIn PDF document text
    • https://www.escolamacrobiotica.pt/backoffice/assets/js/kcfinder/upload/files/96162601059.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/zajuxuvo.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/pevugozu.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/25899144549.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/xenifamemokiboweri.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/jewumosalolonokiwet.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16160bd1b317f9---boravizo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/lbga0na1jl8lnr10nutulb347v/sizakos.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/bexuvipasuzoxusuken.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/tuxofagokigotivezinakeril.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/mf919lcb818f1adupbo21i6fsp/79310755702.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/fedimagidi.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161e2fa3178582---88029759451.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/91183529699.pdfIn PDF document text
    • http://cadex.biz/app/webroot/kcfinder/upload/files/71766808177.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004af4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF4C 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0004c66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C66C 10824 bytes
SHA-256: afc16fd4226074dd07d57335de6cb337c15914bb05e09d5bb60fe2c34c9c9429
font_02_sfnt_off0004df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF46 21772 bytes
SHA-256: 5b12c41fadf04eb122849aebd9800694a968ad9a5071f73048c5c4446bdd4868