Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e20baebe128d092…

MALICIOUS

PDF

82.2 KB Created: 2021-04-23 05:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a051e28f98ac19e81206695392d6823 SHA-1: 70d734b8714b236ca0ad6c59d5431546944ca113 SHA-256: 0e20baebe128d092460d74eee04d5e68de0d70b3b47505dc1c76fa756dc0cab5
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-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://jacksth.ru/strik?utm_term=lifetime+44+impact+portable+basketball+hoop+reviews PDF link annotation
    • https://cdn.sqhk.co/pesuxitum/hjhfgjb/zed_build_lol_wild_rift.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421462/normal_60039823d84bb.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/jb0idib/chores_list_in_spanish.pdfIn PDF document text
    • https://gituruledutaza.weebly.com/uploads/1/3/4/4/134401886/buzarux-rivoji-saturago-bofugolov.pdfIn PDF document text
    • https://cdn.sqhk.co/webaxepibi/fjdVghY/kiboxeket.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzevunoxina/jgegfWB/dogmatismo_vs_escepticismo.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/ijvhfih/fudesuwajone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5fd3a73e8b9d7.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/2e9e49.pdfIn PDF document text
    • https://bogixeguwumuzu.weebly.com/uploads/1/3/4/5/134503630/5413436.pdfIn PDF document text
    • https://gidepojijozi.weebly.com/uploads/1/3/4/2/134235950/7179472.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/hiO9hey/gekivos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_6021ceed22d0b.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/dgciaE6/kogavuf.pdfIn PDF document text
    • https://tefovaxosu.weebly.com/uploads/1/3/1/1/131163863/2132868.pdfIn PDF document text
    • http://monoga.space/blade_inductrix_fpv_hd3dm5v.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/5488384505kh486.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/jasipefulaxiduj/77750470292.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/sodawo.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/ganavobazukagoxi.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_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 5640 bytes
SHA-256: 563070f4f6fea80ce45910a7b5b0bd31ed454eda6b19dcd4febbc37696a6fe2f
font_01_sfnt_off00011399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11399 11772 bytes
SHA-256: 27a97b711a2716171a9b5b497aa7d56bf2e23450b1dde2c42a0d0da342b852c2

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