Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6ce4df5671f32e…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 04:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a1b1d0f82e617abd8008d404009e895 SHA-1: d81d95a399a283a53f14ed3a1db2f9e9d14af000 SHA-256: 2a6ce4df5671f32ebcd25ef7b8a4295900386de38802fe8c1c86115d4773d682
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially obfuscated, suggests a lure related to a sick mother's prayer, likely to direct users to malicious sites like 'bologen.ru'. The presence of embedded URLs and the PDF structure strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=a+daughter%2527s+prayer+for+her+sick+mother
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5fd5f5079dd64.pdf
    • https://lolewifewo.weebly.com/uploads/1/3/4/7/134710585/7347266.pdf
    • https://tujazemedup.weebly.com/uploads/1/3/4/4/134473975/0f105bda.pdf
    • https://cdn-cms.f-static.net/uploads/4415740/normal_602365e77dbe5.pdf
    • http://jakor.pro/dinamicas_de_presentacion_para_alumnos_de_primero_de_secundariawvu97.pdf
    • http://usejus.club/73183903953njedo.pdf
    • https://fosegeluka.weebly.com/uploads/1/3/4/7/134717840/842320f19.pdf
    • https://bifukedupojuxi.weebly.com/uploads/1/3/4/4/134498794/d496e8c6dead.pdf
    • https://defavelusanopef.weebly.com/uploads/1/3/5/3/135345674/ladibil.pdf
    • http://muldwych.com/xiforabasogimoxipojofaipxea.pdf
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/6280260.pdf
    • https://kufurana.weebly.com/uploads/1/3/1/4/131482954/lelebox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/salosibejodod/71770909137.pdf
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_8b0595096dd248deb3cbe771748de33b.pdf?index=true
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_e9e77bb2d3bb46c9b4e3f29a64f00bdc.pdf?index=true
    • https://s3.amazonaws.com/rurovikejigibu/why_did_my_rv_furnace_stop_working.pdf
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_1365e26315c441b79cbc18f155f0a385.pdf?index=true
    • https://s3.amazonaws.com/lazolu/bbc_learning_english_6_minute_english.pdf
    • https://s3.amazonaws.com/pewebopufupe/google_sheets_log_scale.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_off0000efa5.bin
41b07be2a02909f1408b62090a6b51e2d9101dd9ff7f68673bf3491a60d6a03f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 5724 bytes
font_01_sfnt_off00010315.bin
2605cfcaf799a89287c9e23413ed320b07043e20154c089366072c8a656827c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 10196 bytes

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