Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab05b86a7419276b…

MALICIOUS

PDF

88.4 KB Created: 2021-04-19 23:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cd0f30c880bfc5daed8c033c33f7507d SHA-1: 7d29b8262078775fabf5f322cffb098dcd246a42 SHA-256: ab05b86a7419276b6f682583da915e295473ff7784867ce32ce07e77dcb739c3
186 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 disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=bell+jar+book+review+guardian PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365626/normal_600aef645ca41.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/xuseminitemewulasizunona.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/sawopemopomadinigemabuvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383930/normal_5ffb9e5621fe9.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/58206156584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_60139633f0faa.pdfIn PDF document text
    • http://bilkan.fun/how_to_enter_into_the_courts_of_heavenre5po.pdfIn PDF document text
    • http://sosed.market/7440412588h3wrs.pdfIn PDF document text
    • http://medicinfo.online/xijufumenawixagaxodly6n6.pdfIn PDF document text
    • https://padudarudiloga.weebly.com/uploads/1/3/4/7/134714427/ba7e4537ea23a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_6048711391f99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366958/normal_5ff2cf7ec8636.pdfIn PDF document text
    • https://mogiwivimar.weebly.com/uploads/1/3/4/7/134731652/juroset.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/guxirudufemevir.pdfIn PDF document text
    • https://mujamixoto.weebly.com/uploads/1/3/0/7/130776872/pavafadegikajaji.pdfIn PDF document text
    • http://servicesforsupport.com/how_many_carbohydrates_are_in_a_taco_bell_crunchy_taco_supremem4k83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_ee8eafcf098e47a4ac784d2ac71a87f1.pdf?index=trueIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_db7b88c12a584871a77bc1c00856cdf7.pdf?index=trueIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_0baf01f2a2b440eaa64b56e0c85f40a0.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_30c1a7fbda9d4e6fb129ccb96341c8d8.pdf?index=trueIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_6eadcf3f62574150b2fcb90655bd466f.pdf?index=trueIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_7776f0153e9840b2906950a8d697a60f.pdf?index=trueIn 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_off00011c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C96 5296 bytes
SHA-256: 308b31b2ec33455e70cbf4de247ba117d19ada3b306ba03dd3786990f267f86d
font_01_sfnt_off00012ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC7 11412 bytes
SHA-256: f52d07b386ab2b0e9d6024aef40966ef1f535b281cbcac1b2a1e2271aae08f8c