Malicious PDF — malware analysis report

Static analysis result for SHA-256 6682732a77bc9730…

MALICIOUS

PDF

76.9 KB Created: 2021-02-19 23:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 78cf8f062aec5bf4e2a3aaefac9f22e1 SHA-1: 74554ceebd47133cd06dd09a84fe26e3dac442f2 SHA-256: 6682732a77bc9730d96fc3b6d8406248d3b174ff76c939f25d36c7634b24fcf6
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary URL, 'https://seumenha.ru/wix?keyword=iemu+apk+for+android', indicates a lure related to Android applications, likely a phishing attempt.

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://seumenha.ru/wix?keyword=iemu+apk+for+android PDF link annotation
    • http://trudogoliya.online/nujafadovotefiwknwwc.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/a472a.pdfIn PDF document text
    • https://xiwirananuwiro.weebly.com/uploads/1/3/1/0/131070481/3265910.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5fff16b0360b9.pdfIn PDF document text
    • http://robinmani.site/what_does_shape_and_form_mean_in_art2fbyh.pdfIn PDF document text
    • http://dle-tpl.site/bike_race_bike_blast_rush_mod_apkpp8ec.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/loropixutetifuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_602116125462e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_6029d5437f407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_6025c665184e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_600e88005b4a3.pdfIn PDF document text
    • http://theraisins.pro/2423089517842tqr.pdfIn PDF document text
    • http://erogan24.website/919035614935ropc.pdfIn PDF document text
    • http://bluebadge-support.com/joxotemivoxabahpv.pdfIn PDF document text
    • http://therarbooks.com/compare_and_order_fractions_worksheet_teswst30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_6004165f9d921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nirozat.rf.gd/xafidebapedarozikevan.pdfIn PDF document text
    • http://nufufud.epizy.com/87089986291.pdfIn PDF document text
    • http://nototen.epizy.com/16591783723.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_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 4976 bytes
SHA-256: 05a6827b3116ca64e34d64196bc329e5cb8d3468ea2de229a34b56ab7255d4e5
font_01_sfnt_off000102c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C8 10380 bytes
SHA-256: 7af0f14a186b52c079acb21378f2d6fe21dd4c0c48b354a1221e4a811b7746d1

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