Malicious PDF — malware analysis report

Static analysis result for SHA-256 4458b35fe05c4790…

MALICIOUS

PDF

297.8 KB Created: 2022-01-23 12:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 022aecad3fcecb60d1a9aef4e139f030 SHA-1: 0d7d284a31224d21869e8c1c0254f1799a211c88 SHA-256: 4458b35fe05c479067cbddaad785f7a413b57cbf952aa7872d970a60491d3e43
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The presence of multiple links pointing to compromised CMS upload storage and SEO redirectors suggests an attempt to lure users into downloading malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely using embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6835

Heuristics 6

  • 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.
  • 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://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/161c8bcbbb6d78---97292259229.pdf In PDF document text
    • http://verypool.cn/images/upload/File/xizozibu.pdfIn PDF document text
    • http://scsxian.com/userfiles/file/20220122225808_n15k71.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/sikojapoluteg.pdfIn PDF document text
    • https://areicon.com/images/file/vadigape.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/71992687810.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/83976008232.pdfIn PDF document text
    • https://chemainus.gocascadia.com/images/cms/file/16192352915.pdfIn PDF document text
    • http://proxima-design.cz/files/file/1002299841.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/77592442890.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/ginejurovas.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/1rjo7hvnfbrbij50qvprb5nrb1/54250764966.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161d15b668af2c---muzekumizatasubudomixaso.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/xagip.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/39565143690.pdfIn PDF document text
    • http://sablinproperties.com.bd/public/admin/assets/ckeditor/kcfinder/upload/files/kekebenijinisopesoso.pdfIn PDF document text
    • http://nova-auto.com/upload/tusuwadiduzoxiko.pdfIn PDF document text
    • https://quizai.com/uploads/files/68162644720.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/nokunirivuvisefigumow.pdfIn PDF document text
    • https://vida.posilatko.cz/files/wswg/files/gijifuxusunije.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/94515007608.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/gariv.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/molerexodexatatubalaja.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/mewivovoxotikotagul.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021110216500463.pdfIn PDF document text
    • https://insetclean.com.br/kcfinder/upload/files/10089389001.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/5bhJmFgkeCE/uplcv?utm_term=thomas+calculus+11th+edition+solution+book+pdfPDF link annotation
    • https://sgpm.krakow.pl/aaeventy/kcfinder/upload/files/31417816184.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_off00043974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43974 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off00045018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45018 11132 bytes
SHA-256: c586b92c92e3184e901efb81346f587edd1f5f239e3db6df8525481c43977781
font_02_sfnt_off000469bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x469BC 17448 bytes
SHA-256: 4303c5c119be40b7b08cb38c6eb817aa39b586bc257cc9687245a234066a4df1