Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6bd3b5e65cf7db…

MALICIOUS

PDF

76.9 KB Created: 2021-09-20 20:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c73c69f06f979aa9c7c134f941eea5ad SHA-1: e5a5ff71c71658b60d0c0bf1d1265ac701a68a3d SHA-256: 7e6bd3b5e65cf7dbe7c39f9964b25df06e4e0a4a79f06e1299bd6c559258b9ef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to disposable hosting and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://catamma.ru/uplcv?utm_term=nioh+2+futsunomitama+smithing+text PDF link annotation
    • https://hr-serdahel.hu/images/file/bezebojazakugevuwovi.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/63404606561.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/3217079921.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/pisikiwasepov.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/28758042878.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/jafivanuza.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/87481495004.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/78679441496.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143f770ee021---24657528393.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/zatudifovimipi.pdfIn PDF document text
    • https://hssanesteban.cl/files/83518381165.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/daribudijulivogewa.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/wubudofamodosabisusu.pdfIn PDF document text
    • https://airshow-bg.com/file/64440229656.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/xetobigani.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/1402151534.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/vodumatad.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/3875672133.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/3105072439.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/verotewugewinevavep.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/70791214984.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/50451597100.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_off0000ca2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2C 10812 bytes
SHA-256: a28c6eef87493c55a261476e05a675fb5ad62179bf4b9857b2868f1cfe7cbc12
font_01_sfnt_off0000e30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1E 16728 bytes
SHA-256: 56b06774858abd5c65ce7f04e559d7d271459814f4fdc06c8a7915b8c87d280d

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