Malicious PDF — malware analysis report

Static analysis result for SHA-256 564e780d0cfc3663…

MALICIOUS

PDF

76.7 KB Created: 2021-02-28 22:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e5f18076fb757e60835f7266e43db0d6 SHA-1: f0e291bbc0915254411c050ce461533c4e31a267 SHA-256: 564e780d0cfc3663aaadfa0b0d44b04bf0ad07de87556d0cd702811bb0b49430
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it functions as a phishing or trojan delivery mechanism. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to potentially harmful content or malware. The presence of ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://baarspo.ru/strik?utm_term=pride+and+prejudice+1995+online+english+subtitles PDF link annotation
    • https://cdn.sqhk.co/rinovizifim/hRghijd/brain_test_game_answers.pdfIn PDF document text
    • https://wutadesojijemez.weebly.com/uploads/1/3/4/3/134393937/90b900e821b33e.pdfIn PDF document text
    • https://zebaraxofalolal.weebly.com/uploads/1/3/0/8/130813897/vositekupej.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/ajhjXhb/52578904619.pdfIn PDF document text
    • https://jetukuzimol.weebly.com/uploads/1/3/2/6/132695660/e316da.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/what_are_2_benefits_of_glycolysis.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/if3gegz/beli_pulsa_listrik_lewat_m_banking_bca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_600cf7a16d497.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/52416.pdfIn PDF document text
    • https://zerasogamonan.weebly.com/uploads/1/3/0/7/130775055/4c3420301.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/76586776762.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/benuka/bittorrent_search_movies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/harlequin_euphonium_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/cash_flow_projection_report.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_off0000e6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AF 5884 bytes
SHA-256: db603fa6a8aacca31fb2dc0e6d1fee10aa122561c71acd4de95fce7f2ade1a0a
font_01_sfnt_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 14220 bytes
SHA-256: 4ce6622f82260d376be2647078984c98d7a1a38a74c361dacaf3dcf9fa74d893

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