Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6a92f4606212df…

MALICIOUS

PDF

81.9 KB Created: 2021-03-23 18:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0f520673def0f140c9f34ec68d3ccef3 SHA-1: 2df2903fd06f6f977cb25c25308e0a28794d3c60 SHA-256: ed6a92f4606212df4c3748b623a73d504badbc9c503169ffd5ede0d865075407
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 hosted on disposable domains, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/strik?utm_term=how+long+will+a+2008+ford+escape+last PDF link annotation
    • https://robesiladobaluj.weebly.com/uploads/1/3/0/8/130813577/03eb5b09c544.pdfIn PDF document text
    • https://betisokoredig.weebly.com/uploads/1/3/4/5/134505727/3871039.pdfIn PDF document text
    • https://cdn.sqhk.co/runusamopit/AO0fide/how_to_make_a_reusable_face_mask_smaller.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/brother_enemy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_600f4d5191dbb.pdfIn PDF document text
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/welozixixi.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/letter_of_reference_for_teacher_from_parent.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/zipunolodig-xilebowixibi-mawov.pdfIn PDF document text
    • https://lefiletigej.weebly.com/uploads/1/3/4/5/134597596/2114439.pdfIn PDF document text
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/zorarujitudut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470677/normal_600176a1361a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5ffc9d47a0bf9.pdfIn PDF document text
    • https://cdn.sqhk.co/fugapaloter/iageP9z/panda_pop_1005.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/4601701.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/gfhgmay/battle_ops_bumblebee.pdfIn PDF document text
    • https://xunasumip.weebly.com/uploads/1/3/2/6/132696393/gowiranedamipil.pdfIn PDF document text
    • https://naviguxiva.weebly.com/uploads/1/3/4/2/134266723/94e713a158f82.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/86876773071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_605719a716c4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5fd7bbcc73ca9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/96706025554.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/gimetefuzoralopopodiki.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_off000101a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 5844 bytes
SHA-256: 296f4676a7cece7e6d9c4dfde0dcb234d27a8df99f3b662700c0b8f65c06f5e5
font_01_sfnt_off000115b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B3 10564 bytes
SHA-256: 0da76606bf94341b3cbd7c7713ecaccb3e814e0df5f1f015bfcb666937466bf1