Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8da38014f9f664…

MALICIOUS

PDF

75.9 KB Created: 2021-06-11 00:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 15ad37fa306e1503c72c723fb99c6f32 SHA-1: 6a784b6cfc158f48f142e1e32c06a606498fe360 SHA-256: fe8da38014f9f664de8a8907273ececdae11f00fcc963bf5c338a5010cc71f63
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and a high ML score, indicating malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to contain keywords related to compatibility, likely a lure to direct users to malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://drafthe.ru/pbw?utm_term=myers+briggs+infj+compatibility PDF link annotation
    • https://wunenogapo.weebly.com/uploads/1/3/4/5/134509221/3686340.pdfIn PDF document text
    • https://renefifukidib.weebly.com/uploads/1/3/4/3/134343870/2189283.pdfIn PDF document text
    • https://nudusomezuriful.weebly.com/uploads/1/3/5/3/135387444/gipuxoxisoxago.pdfIn PDF document text
    • https://xokijawajix.weebly.com/uploads/1/3/4/7/134726357/7505094.pdfIn PDF document text
    • https://pilopumif.weebly.com/uploads/1/3/4/7/134733378/67d33120c743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_605611bd7f9a5.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/4221072.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/jezime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_60c27fe2efbb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_6010b3b1e32a8.pdfIn PDF document text
    • https://zitifulopesere.weebly.com/uploads/1/3/4/7/134722705/cb60ffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491926/normal_605152bbde250.pdfIn PDF document text
    • https://velupilarase.weebly.com/uploads/1/3/5/3/135341581/vagexatudenokux.pdfIn PDF document text
    • https://kudilasiwutoxe.weebly.com/uploads/1/3/5/3/135314551/64c9f204.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144652242/dnd_5e_descent_into_avernus_free.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/82401695631.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144499800/49641694064.pdfIn PDF document text
    • http://naxenuve.pbworks.com/w/file/fetch/144825345/ejercicios_de_division_de_dos_cifras_para_nios.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/w/file/fetch/144546057/nadivumikifadexuwaw.pdfIn PDF document text
    • http://doxawadar.pbworks.com/f/sixaxis_controller_no_root.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/697946572.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144424269/78007567860.pdfIn PDF document text
    • http://piwomimagito.pbworks.com/w/file/fetch/144768453/does_foot_detox_bath_really_work.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_off0000e9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 5660 bytes
SHA-256: 5de5dc90ee90a369eadbafaec65fc52580918cc3c9f5bf24aa256a713ac7343b
font_01_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 11004 bytes
SHA-256: 69152e7baab25bd515eda02ea8ccad19c5b4a971d63191b515bbfba651040835