Malicious PDF — malware analysis report

Static analysis result for SHA-256 92628b3f263186d3…

MALICIOUS

PDF

77.0 KB Created: 2021-03-03 17:00:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e15cd0119c6fb119007e5a22c0e75891 SHA-1: b2bec68c1550c30d3d5ba2cd0e0d7f375571f80d SHA-256: 92628b3f263186d3be085c88a698c0de453513da0cd3317eb20594558e5209bc
146 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. The presence of external URIs and a link farm heuristic suggests the document is designed to redirect users to potentially harmful websites. The SE_CALLBACK_LURE heuristic further supports a phishing or scam-related attack pattern.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/wix?keyword=harbor+freight+return+no+receipt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5fde6659ab7a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417990/normal_600bd02180017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422161/normal_600638d62f819.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/how_to_recognize_each_mbti_type.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/mamovomawusefuruxin.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/ghfCaf1/nujagaliritaserozeruvulod.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/sanutopazanagonujuzuwon.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/43609179958.pdfIn PDF document text
    • https://bamebifubakuta.weebly.com/uploads/1/3/1/4/131408159/pofulejexim_zusez_nizanisute_lajimifugefasax.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/kuwotopurugebi.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/XgdTjbB/redude.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vivulipepuk.epizy.com/75790311782.pdfIn PDF document text
    • http://patabajisof.epizy.com/salolida.pdfIn PDF document text
    • http://setiwol.epizy.com/concrete_formwork_chamfer_strip.pdfIn PDF document text
    • http://sobupedu.rf.gd/majubobidewawasabobikomip.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_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 5168 bytes
SHA-256: 119d365fbb5ad39f0eb177b37a45dbadd59f6ef83739a5bf3216aebb244464ae
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 10644 bytes
SHA-256: 2515dc1a5c85f9af970883afe160d4e37d498cf5260ac088b4cb6fcc6a845302

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