Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c37b3b259d9322…

MALICIOUS

PDF

76.2 KB Created: 2021-05-21 00:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 621cb9bb8f3e890ea7820272fe4e38fc SHA-1: 20b6c8f60cb4b7b789df4990c9a8602ac9068cfb SHA-256: c2c37b3b259d9322eec971d908a7691cb936b70c41f5d5ba7595fc0bdfcabc26
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely a malicious domain used for phishing or to host further malicious content. The document body, though partially corrupted, suggests a lure related to product searches.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=weaknesses+of+north+face+jacket+cheap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424982/normal_604cba0bc2e52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_60521e98500d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420260/normal_60055f78aa627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_604a6ace8c68e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5fcaf2b5f0d56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_602ade6b5c473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421611/normal_605505d6d911c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502439/normal_5ff7575c33349.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/loxopudizus/skype_7._41_offline_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/ejemplos_de_citas_textuales_con_formato_apa.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/kidivilijirudi.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/english_conversation_15_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/does_keratin_complex_smoothing_treatment_contain_formaldehyde.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/mexoriderixigaris.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/what_is_the_best_spray_floor_mop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61160690-628b-42ad-af58-a81aee5d8c53/tortilla_flat_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/nimaro.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/1017687146.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/finibekulejuxemazura.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/capex_and_opex_budget_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e193c78-129d-4140-8eaa-fd7648dafd42/jimex.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_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 5224 bytes
SHA-256: 05d54b56a341a16a40ad19b061e1fed9817c072dd758aa5d0dd0b8a470d06ab4
font_01_sfnt_off0000ff9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9A 10536 bytes
SHA-256: eb1681512be00570b68148a1568cf3d404bc0a64d0b66c1d2eac49f48e7dfd48

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