Malicious PDF — malware analysis report

Static analysis result for SHA-256 510b056c7ade4510…

MALICIOUS

PDF

71.4 KB Created: 2021-03-07 21:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b61bcbfe5a7f0f9bcbf80844859d58fd SHA-1: 9e61c59ec5dea782815e293779df9772a2d5eb8a SHA-256: 510b056c7ade45104393a8174349d3862f1b7a73608262be5ddfac8af9de9e47
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=age+of+sigmar+path+to+glory+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405925/normal_60057e0c77f4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_60394cfb05570.pdfIn PDF document text
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/dfa5dbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504641/normal_602a1016cc261.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/iaEjbii/61915310241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_600a2497c4301.pdfIn PDF document text
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/5357661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486537/normal_5fd822bfe9b2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_5fe3e4f05df90.pdfIn PDF document text
    • http://legalvictory.group/tanowujuxezefibc7g2.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/0hahbib/59368563254.pdfIn PDF document text
    • https://wivilunox.weebly.com/uploads/1/3/1/4/131453894/233ccc.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/f4Chdmb/25707071572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_6042fa38e1b65.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/bitinebaguwamelegulifik27oym.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/UdShcja/wojobobofawe.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/djjOrig/leappad_ultimate_youtube_app.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://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_dfb6ec4858a244e4947f1a736ed5bb32.pdf?index=trueIn PDF document text
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_2025ebd992c74d54ade83cf8e1e7e06d.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_off0000c973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC973 5428 bytes
SHA-256: 1e069906d11e7f0ac1ac663beeabb3a7270bc214ad6f1237e4684fbfe6cd47ac
font_01_sfnt_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 11680 bytes
SHA-256: 5acd41460f5f2ead23aecb498befc23b807023b1d74c0fe41d504630219e7e2b
font_02_sfnt_off00010220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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