Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe3bddd0670b335…

MALICIOUS

PDF

102.9 KB Created: 2021-02-27 10:10:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 38a656e7cc4d76b12d637e8f429b074a SHA-1: e8342ac0799ecaedbe09201c5c062d75b766f1e3 SHA-256: 2fe3bddd0670b335d6eef37b50d293004b8588f07afea353981796377c6c78fb
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of URLs like 'fokemale.ru' and 'tesurupijirixu.weebly.com' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://fokemale.ru/123?utm_term=how+to+open+philips+nose+trimmer PDF link annotation
    • https://tesurupijirixu.weebly.com/uploads/1/3/0/8/130813669/472053.pdfIn PDF document text
    • https://buregagoli.weebly.com/uploads/1/3/5/3/135304756/5899975.pdfIn PDF document text
    • https://posokirotol.weebly.com/uploads/1/3/2/8/132814476/2493449.pdfIn PDF document text
    • http://milansit.space/11793772954fm5p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_5fdbc627a3a66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_5fd317611682f.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/dilorapod.pdfIn PDF document text
    • http://instapodarok.site/superhero_in_flightxwmah.pdfIn PDF document text
    • http://bupetud.xyz/practically_speaking_onlinect822.pdfIn PDF document text
    • https://vixezijimike.weebly.com/uploads/1/3/5/9/135993975/jaxadurafit.pdfIn PDF document text
    • http://kivumokaf.22web.org/zonukudesenomajeduribu.pdfIn PDF document text
    • http://creampiepow.club/what_does_s.l.a.n.t_stand_for25xqe.pdfIn PDF document text
    • https://xunedoworevesa.weebly.com/uploads/1/3/1/1/131164322/3336b8c990b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_601f6b93b50f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapakipoborepuj.epizy.com/pazipamojuzumugekanet.pdfIn PDF document text
    • http://rupijelovugibiz.rf.gd/3d_warehouse_sketchup_pro_2016.pdfIn PDF document text
    • http://josuguremim.epizy.com/55615978968.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/searching_movie_parent_guide.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_off0001569f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1569F 4900 bytes
SHA-256: 16458ec99b072fb5776f9a32d766110362ec6b1dde823e827440fb7f4774367e
font_01_sfnt_off00016732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16732 11576 bytes
SHA-256: d1e404384ac991fb73c6dceed0f5652291d71cb19340d37ca70075b92b5c537f

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