Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8ee07e9b4f4174…

MALICIOUS

PDF

75.2 KB Created: 2021-06-15 12:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cfa6fc6a0e984f395f7f8754698e4661 SHA-1: 81233fd14ea082f2b1d086529d9d7307b97ac98d SHA-256: 0c8ee07e9b4f417493eacef1b8a26f416652d0c7b390ae398689d93c9602cf6d
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 0.9997

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://crewmak.ru/pbw?utm_term=pokemon+emerald+cave+map PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5fca43b79c63a.pdfIn PDF document text
    • https://fixaporaxaju.weebly.com/uploads/1/3/1/4/131413905/tikotibebom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_60314671dfc72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459054/normal_601b9965a4be3.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/5bb28f0f0fc1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_605472d481b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_601a21702c525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428061/normal_6052c169780c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fcf6cdf7e398.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408853/normal_60045df3e98ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukabom.pbworks.com/f/birigerefuvarage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1debb7-ab8c-452c-bf6c-ed4c4c13ce4c/18191938858.pdfIn PDF document text
    • http://vogituvu.pbworks.com/f/pelicula_de_baile_urbano_parte_1.pdfIn PDF document text
    • http://buzivevej.pbworks.com/f/pokemon_emerald_nds_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57529715-4092-471d-b193-b54ff5b75eb7/woguliwipunijiwujimenavu.pdfIn PDF document text
    • http://lojefizowoj.pbworks.com/w/file/fetch/144682338/38850128554.pdfIn PDF document text
    • http://mepetibewo.pbworks.com/f/rinuzizawa.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/60093046205.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/w/file/fetch/144455271/briggs_and_stratton_intek_engine_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c84e52-72bb-4eec-b05b-a45f6b76362e/online_technical_analysis_course_in_hindi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD677 5108 bytes
SHA-256: 2376a1664ba0bc61087080ccf0824e4798e44692fbb9d0acbdc380036acb7824
font_01_sfnt_off0000e85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85F 5164 bytes
SHA-256: bf1c80c90c11445f02d2dd10669d8b3a5fdbd4805860b2b2a4e499fc5e5dccac
font_02_sfnt_off0000f9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E8 11032 bytes
SHA-256: ea1da623912660462526ecd1beff8e8a845905102eed0a4585fa389eaefc1fe0

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