Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c02689e144c7b32…

MALICIOUS

PDF

81.2 KB Created: 2021-03-02 18:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 731345a57fd1873615045116823d0656 SHA-1: 5c3a05829d7660d700ffb5bffaf02cf07ba3afd5 SHA-256: 2c02689e144c7b327300debb624a159e594a0fa305d58e5f1db9b04fbcf03dcf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains an embedded URI pointing to 'maypoin.ru', which is likely part of a phishing or scam campaign related to printer cartridges. The PDF structure also suggests it acts as a link farm, with numerous distinct hosts, indicating a coordinated effort to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=hp+officejet+8600+printer+cartridge PDF link annotation
    • https://cdn.sqhk.co/pabefidinaz/zoieigN/sutitevakafugipedobiwin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458623/normal_600776d03cddf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5ffdf06c8ad06.pdfIn PDF document text
    • https://nolokevajazovap.weebly.com/uploads/1/3/4/8/134888215/zosuko.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/lekabo_wopiperekexadij.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/wujeraru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_60321427479c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_6018ac543eb20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/easton_arrow_shaft_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/sigid.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/kevurazejadexizigo.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/daraz.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/how_to_use_the_8_qt_instant_pot.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/12636972456.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001006c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 5640 bytes
SHA-256: 1c6f72ba25f2676a422c859cfe0e16da7a8810483110daec145fd7d170c13979
font_01_sfnt_off000113b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B7 10476 bytes
SHA-256: 18774a161a5c807a2889ae8059bfd008f1caa5902bf67a71699fb054761274ed

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