Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d71234dbe67979…

MALICIOUS

PDF

112.0 KB Created: 2021-02-24 16:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1fc7919d37a3925995fd11f162cf5952 SHA-1: 77731f4710b91a6d045c7f6f10f7d608abcfa7c5 SHA-256: e0d71234dbe67979b72e502f6f51463a91e1ac81fdc17e9f1ec21960ac042e9c
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 0.9998

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://baarspo.ru/wix?keyword=epic+summoners+monsters+war+guide PDF link annotation
    • https://cdn.sqhk.co/lewatesudo/g7VpCRm/12542873504.pdfIn PDF document text
    • http://maslovauto.ru/zetepadewubazawasizutujotv5v8x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_5ff384030e8e4.pdfIn PDF document text
    • http://gratoramaa.website/lamumotosuzavolojovpf1qb.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/bhahcih/88339121571.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/juugdi3/the_art_of_war_sun_tzu_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418188/normal_5fc7b534d04c6.pdfIn PDF document text
    • https://cdn.sqhk.co/kesavaki/hQCieZb/temple_run_2_apk_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/cOhf8Yd/dizebelajilukinibixu.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/polymer_bundle_farm_2017yaduz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_6025123e7ffcc.pdfIn PDF document text
    • https://cdn.sqhk.co/nupumusu/ghCjhhb/gosol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5fee7dedaeb1c.pdfIn PDF document text
    • http://instofficial.online/borderlight_apk_mirror2lo3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxufaxurawago.epizy.com/juzujujugisusadolelufem.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_off0001646c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1646C 2860 bytes
SHA-256: 334cfb5caf2de2a6392c3fd848e3ca70c2296f1c88ee8275f738c665b50502e0
font_01_sfnt_off00016e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E96 5408 bytes
SHA-256: a54785b46bb2dcaaaa7a91e90a1e44e2d3a2c339d5ddfc2aec6ddec4340ccdd1
font_02_sfnt_off000180fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180FB 15972 bytes
SHA-256: b877994ff13b702da5626c6c0477ac29d4344ffae07af79cef59391044831498

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