Malicious PDF — malware analysis report

Static analysis result for SHA-256 c472632365e0cd47…

MALICIOUS

PDF

81.2 KB Created: 2021-03-09 16:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c95b9d3294e942a6c5c9488123365250 SHA-1: 90e6613285a7c31efd436d58973a18b2732c71ab SHA-256: c472632365e0cd47514b1af2bbb135a2787f852b02034f80aee000885c498b95
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 phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=reset+helix+to+factory+settings PDF link annotation
    • http://wgathering.org/bilofugulifolexiouhfc.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/e881245235df1.pdfIn PDF document text
    • http://tevfikyuce.xyz/66249312543fa4a0.pdfIn PDF document text
    • http://lijasojaxivura.22web.org/zerufirozukufezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469350/normal_600f977a8a83d.pdfIn PDF document text
    • https://sujumakatu.weebly.com/uploads/1/3/1/3/131379709/447101.pdfIn PDF document text
    • http://azakalaza5.xyz/romantic_urdu_novels_free_download_2020fxdzx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446034/normal_5ffbb05571748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465543/normal_5ff5d50066c66.pdfIn PDF document text
    • http://testertumentum.space/nfl_football_picks_bleacher_report3utku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_6045b89e6c770.pdfIn PDF document text
    • https://kimiligemapi.weebly.com/uploads/1/3/4/3/134343210/3f5d1af20b6c0.pdfIn PDF document text
    • http://boldly-grow.com/bareginulelejajifunipopuz19m0.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/tonejumo_vozizet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403404/normal_5ff3062512b49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_22dcf388b8a04a44ade0a8c50aa93afe.pdf?index=trueIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_0189a06a17854aa3bd2ee83b6495cec3.pdf?index=trueIn PDF document text
    • http://dipulitexaxuz.epizy.com/web_application_security_assessment.pdfIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_ffb600fce2b149d493ede3e62286938c.pdf?index=trueIn PDF document text
    • http://mipovigubebi.rf.gd/mass_rmv_learners_permit_manual.pdfIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_66c7f834364f410fa03f927a29c81b01.pdf?index=trueIn PDF document text
    • http://rojavaluji.rf.gd/97912535544.pdfIn PDF document text
    • https://78d0a14f-36ff-4d6b-9bac-5fe2b72161db.filesusr.com/ugd/0bcf16_4ed729fad5ca4cbaa7950891abc4027e.pdf?index=trueIn PDF document text
    • http://gazunobopa.epizy.com/best_free_gym_workout_app_for_android.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_off00010148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10148 5320 bytes
SHA-256: dc129e393d492a19bada0352bb3597b158c0e78454233dcd0006941b51abf2a2
font_01_sfnt_off00011375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11375 10584 bytes
SHA-256: 531bb6a453cade9f3e579ba89ae5c568f21cb6d1b3f93597e4af82029c1a0b4d