Malicious PDF — malware analysis report

Static analysis result for SHA-256 0152bf4cb5085e8b…

MALICIOUS

PDF

71.5 KB Created: 2021-03-14 05:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: fd6b172e4b92fe89801222b7b15bbe51 SHA-1: 965ad9862a270ac74ba6894c40b7d9091422dd94 SHA-256: 0152bf4cb5085e8b05f3f7f6a1b04660a08d2494278f936366554e51f56d881c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. 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 be related to search engine optimization keywords, further supporting the lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://lozipotod.ru/wix?keyword=2001+toyota+tacoma+repair+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444623/normal_5fe876244811c.pdfIn PDF document text
    • https://nuvipepive.weebly.com/uploads/1/3/1/4/131409498/nilula.pdfIn PDF document text
    • https://tabutepapuwup.weebly.com/uploads/1/3/0/7/130740025/7815601.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/ximosaw_ranaxipiwipidun_rilexuz_tazesolozok.pdfIn PDF document text
    • http://itasda.online/free_printable_treble_clef_worksheetskkfto.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/fotesenizokozorezobule.pdfIn PDF document text
    • http://opsnatur.fun/disney_channel_guide_eastpucn9.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/3362120.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/wonove_tebabefafiseto_kaxisupedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fd35284a321f.pdfIn PDF document text
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/5e66d1b608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_602518f30668d.pdfIn PDF document text
    • http://obmenkalnr.online/13769416243z1yh0.pdfIn PDF document text
    • http://storedubai.shop/dexult4v3j.pdfIn PDF document text
    • https://situzofunuk.weebly.com/uploads/1/3/5/3/135305293/7453873.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/16164626179.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/giseravatabeferaradali.pdfIn PDF document text
    • http://discount50.pro/automation_testing_tutorial_for_beginnerschdwz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5fcef9876a4f4.pdfIn PDF document text
    • https://bulamudaxila.weebly.com/uploads/1/3/4/9/134903330/032fcac0bdae.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/gunokapasuzol_tigute.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/sogasige.pdfIn PDF document text
    • http://kigumelez.medianewsonline.com/56671418822.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_34f53238e32e4a0d8cf505c93b41d60b.pdf?index=trueIn PDF document text
    • http://negumigimewote.onlinewebshop.net/nifajeguruxibapixod.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_95e6563c60134e0896ae8cfb80374f11.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_d8fcfe0ba5844d97ae7eaa4403cd3df9.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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 5456 bytes
SHA-256: 1ae2d82baa153040d7a06a9943aecec6ab6303d3d5e08af7b87a5627861f2277
font_01_sfnt_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 10188 bytes
SHA-256: 3f4e71e9595a9c1f9f916066eb2b1f99d1a7872a9401290a5b7063aab52e11cb