Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f348abb14896ad…

MALICIOUS

PDF

74.7 KB Created: 2021-04-16 20:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6e70053a5dfeb7563917e319922bc158 SHA-1: c9c08ad8854f0a3f0a6a2742072f02439df46847 SHA-256: 29f348abb14896ad28c8f072bd0a835844d1b982c561e3b8c80d6e69fd01b1c6
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. The document body, though heavily obfuscated, suggests a lure related to a medical condition ('meralgia paresthetica') to entice users to click on external links. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=how+to+ease+meralgia+paresthetica PDF link annotation
    • https://cdn.sqhk.co/vasibejovej/fRUiehd/10_simple_service_projects_for_schools.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/41973736874.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/transport_business_proposal.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/PGigiiO/amazon_music_hd_price_family_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/a8gduUm/checklist_approach_evaluation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382770/normal_5ffd7c4d16703.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/hinehak/27945288295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413987/normal_5ffba3a130a10.pdfIn PDF document text
    • http://bezerojiw.scienceontheweb.net/erythromycin_ointment_davis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_603cccd68a7f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://masusoxowep.onlinewebshop.net/rti_application_format.pdfIn PDF document text
    • http://nogafojomor.onlinewebshop.net/company_email_id_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/data_mining_companies_in_california.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_c7aabfa36927437480b19eae5f596a28.pdf?index=trueIn PDF document text
    • https://411563d6-f1a1-4768-9eaa-86e4eb1f1ae3.filesusr.com/ugd/6d8349_6a37d61b26da496f9eabb86757b03fb0.pdf?index=trueIn PDF document text
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_a4be2e4296434561a31e2a7f4cce3efd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/this_is_amazing_grace_chords_key_of_d.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_off0000e7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7ED 5400 bytes
SHA-256: 69994f9a20c4553e48e21385367f77df76cee666aa0748de45f772e62b8baade
font_01_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 10440 bytes
SHA-256: 61ae74c03b88bb917654b626c6552f85b46f7661377302c7536cb4b13056d8f7

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