Malicious PDF — malware analysis report

Static analysis result for SHA-256 801fd292cf06a184…

MALICIOUS

PDF

78.1 KB Created: 2021-09-13 21:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: eb6a30f756cdfbdb81b889b6f31f6ab1 SHA-1: 3f8d90fa63da9d35d1157932bc728d3853897534 SHA-256: 801fd292cf06a1843f91668e7f9d74121d710dce5515815b597b7d5b3c75245c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to external, disposable domains, suggesting a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a low-quality, potentially malicious hosting setup. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest the PDF is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=android+sound+level+meter+code PDF link annotation
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/32556922432.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/50765146743.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/bisigemesivolasozoba.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/wuwubetomum.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/86159699645.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/mekagajelexitiwuti.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/bomixofoma.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/14638355965.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/89462669817.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/madefajonotepevaxuro.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210912021006.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/wojegoxesan.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/bamigoxevese.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/11955911436.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/ruwanakasagaribedakevojep.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/5c7bfadd855592f87481f9098cc0fbbd.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/28266729163.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/97858330228.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/8344b586e9436b0e1f69f172b4f22e21/33037525150.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/93118364402.pdfIn PDF document text
    • https://primer-spb.ru/files/files/wakirotefaseso.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/jejuvatarisupuzoboz.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_off0000ccf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF8 17616 bytes
SHA-256: 4a4aae23b1d0ed06ee6f03326775d6cb05a85ccd19aa817ad8308286e316664e
font_01_sfnt_off0000faf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001130b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130B 10516 bytes
SHA-256: 2b808f59a70b06d1d38eecd6f53ab4c5aab132b849c59217bee0ec4d10a2bec7