Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c641a2bc75b9ffe…

MALICIOUS

PDF

76.4 KB Created: 2021-04-03 17:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef511288b91524f06d94719ee7f990b4 SHA-1: a2d28e6d35aeb7277c50cac5306ac17ee41ee39f SHA-256: 6c641a2bc75b9ffe02ca0ecf02bbbeb5dd457ca5dc211bd73496ff25ba6baedd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=the+militia%2527s+birthright+review
    • https://xaredeni.weebly.com/uploads/1/3/1/8/131871979/wilotekagotigikoxi.pdf
    • http://rameautbxy.space/therapeutic_foster_care_aztgrmd.pdf
    • https://bikewodeganesu.weebly.com/uploads/1/3/4/5/134596115/0b97bd679bcbd.pdf
    • https://xififaxapid.weebly.com/uploads/1/3/4/3/134344339/4012142.pdf
    • http://table-wait.com/canon_canonet_ql17_g_iii_reviewy5ptu.pdf
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/bedowaje.pdf
    • http://italiabeach.space/how_many_years_to_study_marketing_managementrwmhy.pdf
    • https://nogulakotu.weebly.com/uploads/1/3/0/9/130969216/4869050.pdf
    • http://1xbets-reg.site/cornell_note_taking_template_word3q6op.pdf
    • http://vigikigopaloze.medianewsonline.com/wezedegokuwefox.pdf
    • https://bijivabaj.weebly.com/uploads/1/3/4/6/134601785/netirotisuvonuzixad.pdf
    • http://vefejukexasiku.iblogger.org/anandamath_book.pdf
    • http://reactivascotia2020.com/fixed_assets_on_balance_sheet_definitiongp6m5.pdf
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/5987897.pdf
    • https://gojamomajaso.weebly.com/uploads/1/3/4/6/134616238/wegedogagebu_nifopowib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dulubuli.rf.gd/56030563526.pdf
    • http://donamekadozuxuk.rf.gd/the_art_of_war_book_review.pdf
    • http://sazitoza.epizy.com/14813930629.pdf
    • http://pezamax.myartsonline.com/78621028918.pdf
    • http://bejuzijufure.rf.gd/tugatirapenupaminikuget.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_off0000ee37.bin
0f9f79f17cade3133ab6d937e6d33c178808967d1fc131853a1618e734697a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 5372 bytes
font_01_sfnt_off0001006c.bin
1e05eac4a85cf0b34775f20975351e0233a48661298695b52403cfe7e730549e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 10568 bytes

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