Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd873f08d248cce…

MALICIOUS

PDF

76.5 KB Created: 2021-05-15 11:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 95b45bb535617fafcfba69a094b76c9d SHA-1: c2bc862141039f6b0f4d3b6ab6b87b3f24381f99 SHA-256: bfd873f08d248cce296753dc9522534a9b300eac38a70c38a0e4f590b83e3e5e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=canon+mp11dx+how+to+load+paper PDF link annotation
    • https://sutopudebesi.weebly.com/uploads/1/3/1/4/131438093/5516581.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/gewob-faten.pdfIn PDF document text
    • https://panusefebile.weebly.com/uploads/1/3/5/3/135331690/2753893.pdfIn PDF document text
    • https://bevazemirif.weebly.com/uploads/1/3/4/8/134873662/3964338.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/bozefa-zatilegu-lizizo-pabewoze.pdfIn PDF document text
    • https://logifuvixejexa.weebly.com/uploads/1/3/6/0/136019385/5c43676ed4cd.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/32584382580.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/e8ef1284c022e9.pdfIn PDF document text
    • https://debozapo.weebly.com/uploads/1/3/1/1/131164198/1961347.pdfIn PDF document text
    • https://vatawasuri.weebly.com/uploads/1/3/3/9/133997312/785559.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_e694d49e2ac642d1b7d4ab5dcb59d190.pdf?index=trueIn PDF document text
    • http://sebokegekesuded.atwebpages.com/1658570216.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_002b1188afe24df9bcfeeb27eb7259ae.pdf?index=trueIn PDF document text
    • http://fasokefukolu.epizy.com/general_dynamics_time_capsule_book.pdfIn PDF document text
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_91edd266ce4f4cd093932415159b4d92.pdf?index=trueIn PDF document text
    • http://ragipop.rf.gd/4330089408.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_99253ea0edb349b6b25b244da6b45053.pdf?index=trueIn PDF document text
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_b8b14b84117c445da185c70d1b7e478a.pdf?index=trueIn PDF document text
    • https://334e481f-4595-4613-8514-cf1b68b0f675.filesusr.com/ugd/a5bb32_e00e6c8e274149ce9184f94c3f064898.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_b101642c45bd494b940540df5be01d74.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE083 4996 bytes
SHA-256: 64a99be837191196fa65df08bf0de3957d7bd69af7fde4c31c9fc1cd81c3fca6
font_01_sfnt_off0000f169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF169 10872 bytes
SHA-256: d411aedd915f8e1abd3f3d19cefb4ff44b2773e6543eea7406d9d1666ad2318f
font_02_sfnt_off0001167c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333