Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2a12df0f0b2ca4…

MALICIOUS

PDF

74.7 KB Created: 2021-02-02 18:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4ab1d0a8b8e7d6bbf223a3d91430eb4a SHA-1: e9815f3bda22e26c7553373c4639a9205bbd0884 SHA-256: 4c2a12df0f0b2ca4abbed2479c1cc6e49f5822fa4858f13f98a23568cf29ae0b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as a 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://seumenha.ru/123?utm_term=maine+little+league+district+6 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452169/normal_6003991ce4bc7.pdfIn PDF document text
    • http://bigwin-1xbet.fun/disney_movie_checklist_2018_printablejwu0l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418199/normal_60019b4f27012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_5fd682d2b5982.pdfIn PDF document text
    • http://rfs.team/influencer_synonym_wordscr7se.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450340/normal_5ff0b66185c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_600b9cca90d5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_5ff7819fc8d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413346/normal_600d015c5b482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_601344f193df7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5ff38e35a65c8.pdfIn PDF document text
    • http://stixlife.info/tengai_makyou_2_ps2ro0ip.pdfIn PDF document text
    • http://slampochka.ru/pelican_mall_sinema_bilet_fiyatlarsgyg8.pdfIn PDF document text
    • http://lnstagramcentre.net/swing_low_sweet_chariot_choir_sheet_musicy3wux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tarajix/rudovojafumemede.pdfIn PDF document text
    • http://rabuwupitakif.rf.gd/43623383666.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 5040 bytes
SHA-256: 5617b28ee78e77fdc9208631a180f8ef477f841b7dcabdd2e45b3674db6713a8
font_01_sfnt_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 11280 bytes
SHA-256: f0333007ad1bfefc829400e87470cbb94db9af2b8e1e0f3342b522816085aa3c
font_02_sfnt_off00010faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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