Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed98c6c6a22f05b…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 02:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 35f22d3353ae6e004d875b539bb3aad1 SHA-1: e5375ee4dac52be19512b2406a3fafa6be45aa36 SHA-256: 9ed98c6c6a22f05bbd6d3b8c91e5e7f76ffc375353a48bb148f729d6ed98e914
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and embedded URLs, with one URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to product instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=astro+a20+wireless+headset+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405440/normal_600e623806eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_603d7b77ddfe1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451545/normal_6004d92f393c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421333/normal_601a45329500b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_602f2abcd4824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418362/normal_603b63830c194.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408180/normal_5fe556e7b2a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_601d5d4f8c195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_60323da96c23f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5ff040d6215e5.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/wexukufedepim/wibifibul.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/zupikufagorubofegudikese.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/ucf_immunization_form_turn_in.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/barca_vs_psg_highlights_6_1.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/38553572926.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/fajefitoge.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/android_webview_assets_loadurl.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_off0000ddca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 5384 bytes
SHA-256: 4fc7422c14b1e221642ef8cf45f025a9828a4f71ffd6b566d969b3ec3445b30d
font_01_sfnt_off0000f021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF021 11616 bytes
SHA-256: a4504970a4c761d7d9aa61e0f4ecaab0e17b7ddd7d473b1c76f828e943fb2296

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