Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7233d48edf71a4d…

MALICIOUS

PDF

108.9 KB Created: 2021-06-10 08:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dab7873e1b3b50e229930b9d253da8fd SHA-1: 7dd8b866df51299f6a3b0abd894c900e43c9a220 SHA-256: d7233d48edf71a4d3af601e73b26943ba6cf14f593fce6eb71f88f64f77c4055
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'ectomorph transformation story' and application metadata, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/123?utm_term=ectomorph+transformation+story
    • https://cdn-cms.f-static.net/uploads/4454043/normal_60b992931ef87.pdf
    • https://cdn-cms.f-static.net/uploads/4374532/normal_603a44701e20d.pdf
    • https://cdn-cms.f-static.net/uploads/4369519/normal_602b335bcec53.pdf
    • https://cdn-cms.f-static.net/uploads/4411694/normal_60467792782d9.pdf
    • https://static.s123-cdn-static.com/uploads/4417325/normal_5fccfe5f9122e.pdf
    • https://cdn-cms.f-static.net/uploads/4466151/normal_606c03d939a84.pdf
    • https://cdn-cms.f-static.net/uploads/4453719/normal_60224ac7a0c2a.pdf
    • https://cdn-cms.f-static.net/uploads/4475853/normal_6041528aaf800.pdf
    • https://cdn-cms.f-static.net/uploads/4480748/normal_6055798759686.pdf
    • https://cdn-cms.f-static.net/uploads/4501659/normal_602d4f04aa14e.pdf
    • https://static.s123-cdn-static.com/uploads/4386837/normal_5feb006311e3f.pdf
    • https://static.s123-cdn-static.com/uploads/4381081/normal_5fcf240718f70.pdf
    • https://cdn-cms.f-static.net/uploads/4460723/normal_606cd05363667.pdf
    • https://static.s123-cdn-static.com/uploads/4469836/normal_5ffa3caeaaa83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vamafob.pbworks.com/f/can_you_still_mail_packages_at_the_post_office.pdf
    • https://uploads.strikinglycdn.com/files/4ae65863-35bd-4415-bf00-b275d2d20605/36039760079.pdf
    • https://uploads.strikinglycdn.com/files/204c749a-f5f4-4bd6-a5a9-906ee0369934/photography_portfolio_wordpress_templates.pdf
    • http://kuzimotum.pbworks.com/w/file/fetch/144966084/free_editable_sight_word_worksheets_for_kindergarten.pdf
    • https://uploads.strikinglycdn.com/files/fcd0c8ae-e2a2-4a65-b783-7eb585a5ed3b/felugaramexowuvok.pdf
    • https://uploads.strikinglycdn.com/files/918c9de3-c551-45f4-b001-7f0ada97202b/fawez.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d77.bin
567be227cc6cd056dc546c1e7e79b8cdd12b310b208d06d08703f5ade5002161
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D77 5280 bytes
font_01_sfnt_off00017f4e.bin
9c43e6d1e9222668806b03514deed8e070aff33e9ac5b51c870c6afd40038a58
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F4E 11576 bytes