Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66e790ec6c7a127…

MALICIOUS

PDF

75.0 KB Created: 2021-02-12 22:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 85e22dd03bc5714a296a1316edf998c7 SHA-1: aa0fa36527c4307dc19f102c77ebca8967d02438 SHA-256: f66e790ec6c7a1275a6cad5ee87e1fefb26675f98ead18383efc2e7ca92d44bd
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary URL pointing to 'maypoin.ru' which is flagged as a potential phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple PDF links, suggesting an effort to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

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://maypoin.ru/wix?keyword=new+preschool+teacher+introduction+letter+to+parents+sample PDF link annotation
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/8120523.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/7619951.pdfIn PDF document text
    • http://covidcapsule.world/ping_pong_rules_bounce1stu6.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/xamarin_forms_binding_mode_two_way.pdfIn PDF document text
    • https://baseparefawufif.weebly.com/uploads/1/3/1/4/131453046/2863ddac96e636.pdfIn PDF document text
    • https://dipidedi.weebly.com/uploads/1/3/2/8/132815933/mosurawi_nosebudejivoket.pdfIn PDF document text
    • https://gefivepuli.weebly.com/uploads/1/3/4/6/134620723/bcf6f1b28c.pdfIn PDF document text
    • https://pomugulawes.weebly.com/uploads/1/3/0/8/130814995/b45b06cbabf.pdfIn PDF document text
    • http://begemotiks.space/articulate_storyline_3_trialgm7t7.pdfIn PDF document text
    • http://twirlini.com/rounded_corners_processingiuiyy.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/220680496886xjx1.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/xawiweri.pdfIn PDF document text
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/kemosagefi-nibiwomukuzam-venepagu-mufexod.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/domorudewizizal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vofopinalog.epizy.com/lenokekokunoroxuzawel.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 5376 bytes
SHA-256: f02d93a97f61572a3b49a061006f2104d30c4d03c70cdaa53a98f4a7ec6c2dbb
font_01_sfnt_off0000fae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE1 10564 bytes
SHA-256: dc096f005c7582696817fbfb6bc72680361319e108ee4127cd8eae02599fe3c0

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