Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c32912eb890e23d…

MALICIOUS

PDF

105.9 KB Created: 2021-03-20 09:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 31ddd2a59ad33de91805ab8a72824e06 SHA-1: b3826bce5996f429a4a8bfd1c5a27444bc8ae535 SHA-256: 2c32912eb890e23db74579c6f17719c48aba1db97c0ddf0399845c8189347bd8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=belkin+ac750+firmware PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376609/normal_60465d6fc87c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_60415af99f8cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_601af2af9b2e8.pdfIn PDF document text
    • http://rajulikarizamu.iblogger.org/saxeboxonavopogijatu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368230/normal_5fffc7aca8d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452851/normal_603c0b57e2978.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_b22f99a582d2420a996dc57ea01c7f42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/786a36d8-5e27-41fb-afec-66d31652c0f6/microsoft_access_2010_vs_2016.pdfIn PDF document text
    • http://gegepemu.rf.gd/mugijek.pdfIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_9454ebab83fe41418e491fe6f8d78a27.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_b8bdb299b7df434e94ce83e7d1ac4aaa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac13abd2-6cb0-4721-966d-3879eed937b5/paxubajiva.pdfIn PDF document text
    • http://madepug.rf.gd/clash_royale_private_server.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_73259e4656c3401db33f4208c5e54968.pdf?index=trueIn PDF document text
    • http://lavavoju.rf.gd/kagokilejiduretominevakop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2298b3-1857-4b17-9a8b-7480417976b1/mushoku_tensei_eris_figure.pdfIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_2b104e023a27478aac63726a273ad3d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3cfced3-5920-4173-bc84-387bcdf2a941/1735289981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc7b649-3b1c-4c67-b313-f56776c9ccff/xevawejimeleregaverefi.pdfIn PDF document text
    • http://mebezoworo.rf.gd/77302959095.pdfIn PDF document text
    • http://subedawulowuwo.epizy.com/denis.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_7a3d211aa9574c94935f9cd6f911ccc0.pdf?index=trueIn PDF document text
    • http://xupiganazamezoj.rf.gd/tekipaluxanitikag.pdfIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_5155802e11c94877b00af849f5672c71.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E3B 5400 bytes
SHA-256: 3ef3754dcfe77f2c29a87a12ec01a5c90804a5fa13521e8c9a20c731e6dc2b14
font_01_sfnt_off000170ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170AB 11804 bytes
SHA-256: 2c293ddc498706bdaf46c6f8079b8adec17c831bd1832b5da56aef257bc89e28

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