Malicious PDF — malware analysis report

Static analysis result for SHA-256 003e62ab00da31ba…

MALICIOUS

PDF

89.5 KB Created: 2021-09-11 14:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8678edaa704d74be81b57d317fb347d2 SHA-1: 44ad232b75981a46da38829d2b9ebd3fe3e62c1c SHA-256: 003e62ab00da31ba75e7ea84721a654820c7ee7053f28998a75561d536661edf
126 Risk Score

Malware Insights

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

The PDF contains numerous links to various domains, with many identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://mamalight.net/business_school/uploads/file/gigigunirajepevazuve.pdf In PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/piwilopusovurozego.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/63841272076.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/lidutosupawe.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/6184794536.pdfIn PDF document text
    • http://nemalipics.com/49427374393.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/ragibikebexakomuxamemi.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/82118259298.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/5ab7f63e6044f4aff28e69d5880027a9/55848465148.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613584f1c4f4f---85821860650.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/85717576739.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/24928002196.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/23816532814.pdfIn PDF document text
    • http://ceroki.com/image/files/bijikudibefu.pdfIn PDF document text
    • http://darec.sk/files/files/kitofejaxozujikivewametij.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/wufavotib.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/nifopedusadezuvu.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/94295253765.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/nebaxivule.pdfIn PDF document text
    • http://araonline.hu/uploads/file/tulewesunajedul.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/41484127629.pdfIn PDF document text
    • http://saraswatishikshamandir.com/singhania/downloads/file/xexotowonutema.pdfIn PDF document text
    • https://labelmarket.eu/data/file/15782250086.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/74923758339.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/69288881157.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/vizixonufapatufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=android+development+using+visual+studioPDF link annotation
    • 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_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D54 10884 bytes
SHA-256: 07bf0325375c89ccc9bb10c6975226503ed41644db307841c37ff9087f7c215f
font_02_sfnt_off0001264c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264C 18824 bytes
SHA-256: 143b32134da1e0df5c5f9dd6c30bab1b0f5036576480b32348e7bc786b43135f