Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4f816c5990ff84…

MALICIOUS

PDF

78.7 KB Created: 2021-03-26 12:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a26c28cb10a005c113c579137b2995d7 SHA-1: 2d25e335b22e708f072a299b67cdb41a1bb8851e SHA-256: 9e4f816c5990ff84771104d1577adc8bcd431054edbf6055545b6f407f85dd88
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains numerous embedded links to external websites, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains keywords that appear to be used as lures for search engines, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=john+paul+jackson+death+cause
    • https://static.s123-cdn-static.com/uploads/4393776/normal_5fe312cbef7d2.pdf
    • https://static.s123-cdn-static.com/uploads/4365583/normal_5ff7cdaec49d7.pdf
    • http://tesocoin.online/nejepajv5l.pdf
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/nazivojadovidogapugi.pdf
    • https://cdn.sqhk.co/vumorumuvogi/hFhi7bp/spinner._io_spinz_fidget_spinner.pdf
    • https://static.s123-cdn-static.com/uploads/4424630/normal_6006ae17db3c5.pdf
    • http://com-signto2.xyz/catalogo_dupree_campaa_14_2020svn9s.pdf
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5fffb79290461.pdf
    • https://cdn.sqhk.co/fuvavegipap/hJ3Qgjf/siwinepusopose.pdf
    • https://cdn-cms.f-static.net/uploads/4527902/normal_5fd6e28948209.pdf
    • https://cdn-cms.f-static.net/uploads/4382418/normal_605d7cde04169.pdf
    • https://cdn-cms.f-static.net/uploads/4421209/normal_604fc4d59882e.pdf
    • https://cdn.sqhk.co/pewowutefiw/TifgXp2/decision_tree_template_google_docs.pdf
    • https://cdn.sqhk.co/josipinu/Cjg8ge3/log_into_my_bt_account.pdf
    • https://cdn.sqhk.co/pibusupi/jfxhhhg/93022457467.pdf
    • https://cdn-cms.f-static.net/uploads/4374703/normal_6051556cb8a33.pdf
    • http://govnosiakxws.online/pupulixelevav615x.pdf
    • https://cdn.sqhk.co/lewikokezina/giiggcy/pisukuwe.pdf
    • https://sasifebuwanozag.weebly.com/uploads/1/3/4/2/134234849/0094b34a2a548.pdf
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/takawekefexad.pdf
    • https://cdn.sqhk.co/jinubodilev/kijhcyx/vevisok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f664.bin
8ad6bc55318d9d2cf56f0261a885c9e455ebc56993cf482b1dc45d1a7254e8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 5192 bytes
font_01_sfnt_off0001080e.bin
d46c457429f11a7f299a19c5fb3da5da6dd04825dbbf33c7a3e3bea83e60acad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1080E 11144 bytes

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