Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2dfc382313dfb58…

MALICIOUS

PDF

80.9 KB Created: 2021-02-20 01:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6034101c8965048dac5b997e9afb6f2b SHA-1: 49fad6a858de823513e94e22963970775159e496 SHA-256: a2dfc382313dfb58115185e91ce61099b28cfbab1ed7776b03090e761392f7b7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm with numerous external URIs pointing to disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs, such as https://maypoin.ru/strik?utm_term=spiral+dynamics+integral+audiobook, are likely used to redirect users to malicious content.

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/strik?utm_term=spiral+dynamics+integral+audiobook PDF link annotation
    • https://kogozifimasubi.weebly.com/uploads/1/3/4/1/134131491/tuseziramodufed.pdfIn PDF document text
    • https://cdn.sqhk.co/besiwowegin/2lTihbP/tile_stores_near_me_open_now.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/31ad30225.pdfIn PDF document text
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/7949399.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/bisuxami-doxonesizex.pdfIn PDF document text
    • https://wazafalesozem.weebly.com/uploads/1/3/4/4/134498636/2963316.pdfIn PDF document text
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/1469126.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/kovezodepugov/62013174951.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/5180467640.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/16964100174.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/julius_k9_dog_harness_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/43414360970.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/mutinikifuki.pdfIn PDF document text
    • http://xafonabikox.rf.gd/19949061877.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_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 5804 bytes
SHA-256: b15022368486310a64857984e8b0c0af19ecb1f31c1d17c5a10a189a45033edb
font_01_sfnt_off00011147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11147 11028 bytes
SHA-256: 7747fc09e555fc4e82b625b3915388750902e478816492790aefa00b49e625b3

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