Malicious PDF — malware analysis report

Static analysis result for SHA-256 827ee06205d530bb…

MALICIOUS

PDF

90.3 KB Created: 2021-03-31 01:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6b1cad92a08aeb45126ccc7e649caab6 SHA-1: 295148cbc00abb99642b34270417cbcf4a3fcbf1 SHA-256: 827ee06205d530bbef95e8d3c9d941c6ed3bf3fe43c18dd7f3906cccb4ea11ea
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates redirection to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://zajinet.ru/award?keyword=la+derrota+del+neoliberalismo+en+bolivia+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384308/normal_604af32b919a9.pdfIn PDF document text
    • https://mawoluzapulumar.weebly.com/uploads/1/3/6/0/136082117/bokusofafos-pijososuged-mexikozijux-munitaregutuf.pdfIn PDF document text
    • http://rukozhop-guide.com/hotline_miami_ps4_trophy_guide7hhfx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478438/normal_6009243e2a195.pdfIn PDF document text
    • http://ejqy.com/face_masks_near_me_rite_aidjusqy.pdfIn PDF document text
    • https://wagidojinubem.weebly.com/uploads/1/3/1/4/131438567/bbb2ec7b11d.pdfIn PDF document text
    • https://rijojuno.weebly.com/uploads/1/3/5/3/135310883/d0b83.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/daduzawizalazivazeliwu.pdfIn PDF document text
    • https://xaduregenotilok.weebly.com/uploads/1/3/4/7/134711203/2130933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453908/normal_60121aed43747.pdfIn PDF document text
    • http://verifybadgesbusiness.com/how_to_make_a_conference_call_on_shoretel_230ucjrf.pdfIn PDF document text
    • https://zoxusikajikad.weebly.com/uploads/1/3/4/8/134851315/1012432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446395/normal_5fcd0cbee520a.pdfIn PDF document text
    • https://fawirato.weebly.com/uploads/1/3/5/3/135392883/natevano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifetexivex.rf.gd/39005865913.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/posthumanist_applied_linguistics.pdfIn PDF document text
    • http://jajogagek.atwebpages.com/mathematics_questions_and_answers.pdfIn PDF document text
    • http://pizenusogusu.atwebpages.com/39938735186.pdfIn PDF document text
    • http://poxoner.rf.gd/933873297.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_off00012456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 5328 bytes
SHA-256: 3d2d1c24fc08897715f6efa53081f8f64e29da4eede2167d630fc13e15fca76b
font_01_sfnt_off00013660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13660 11512 bytes
SHA-256: c2ee3bd382daa3a1d239b2099f8d7ff76967f449820eca5af94de68a77c8262c

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