Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bdc2a9e6934879…

MALICIOUS

PDF

73.3 KB Created: 2022-04-20 11:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: 55d85fbfe285eeb058b9257afe2b4012 SHA-1: 003510c1d44a948f93d04e8e5a3c056ee0fe20c4 SHA-256: a8bdc2a9e693487936e11cb5dc641cf41e50b58040a328329782109b63eb35b9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, while truncated, contains text related to secrets and relationships, potentially used as a lure to encourage clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Viral-video clickbait PDF links to suspicious host critical SE_VIRAL_VIDEO_CLICKBAIT_LINK
    Document uses viral/leaked-video lure text and links to a suspicious disposable-looking web host. This is a clickbait/traffic-scam carrier shape rather than a benign PDF link.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://sunuf.co.za/YmrXLWy8?keyword=keeping%20you%20a%20secret%20pdf%20espa%C3%B1ol PDF link annotation
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/wedasomusos.pdfIn PDF document text
    • http://entwuerfe.premo.at/userfiles/file/pelunizoj.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/bibiforunenus.pdfIn PDF document text
    • http://autovoda.ru/upload/files/10155784678.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/tenevowejeven.pdfIn PDF document text
    • https://ccenter.ro/userfiles/files/33394750666.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/rujasanujufagal.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621225ec82558---luwepimi.pdfIn PDF document text
    • http://aleksandriya.topmebli.com/content/xuploadimages/file/4514162318.pdfIn PDF document text
    • https://tajeer.co/userfiles/file/xipugatugugaxa.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/3114096065.pdfIn PDF document text
    • http://coopaac.com/assets/kcfinder/upload/files/kejom.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1622344f08abd1---nurizatabomaxutazuvenoro.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/bavujogojatala.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/jidewuxolobegowokadixidot.pdfIn PDF document text
    • http://mojuerp.com/uploads/ckeditor/files/20220404042452.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/43859956775.pdfIn PDF document text
    • http://aleksandriya.topIn 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 extracted file (font_00_sfnt_off0000b315.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b315.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB315 11208 bytes
SHA-256: 04ff16f446abf2b137a2c8529df96843127abde801340fd2f0b88778994a88d1
font_01_sfnt_off0000cd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 19232 bytes
SHA-256: b6375058ab613a4c8d767137910f7c5402dbb2609807a2c0553c19becfbd9687
font_02_sfnt_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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