Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc80b209272f49f2…

MALICIOUS

PDF

69.2 KB Created: 2020-12-24 23:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6abaf20e7b593d21047b747d6ebdcba4 SHA-1: b831a47271373176d62e000155ba344527187dee SHA-256: fc80b209272f49f2648b995fbfc321b2ea58d51ded19526979a1d1cf2e10812e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs pointing to a link farm hosted on disposable domains, indicating a phishing or scam lure. The document body is heavily obfuscated and appears to contain junk data rather than user-readable content, further suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?utm_term=suikoden+2+rom+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407066/normal_5fe34cb41c107.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/denotid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5fad71a5161d6.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/hhSiihj/island_21a_pointe_au_baril.pdfIn PDF document text
    • https://kapovisawok.weebly.com/uploads/1/3/4/6/134652754/zexipuvapori.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/liwodofo_nelafobub.pdfIn PDF document text
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/maresirugonijerel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423757/normal_5fcf92a8ea1d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410416/normal_5fac144a18f21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459478/normal_5fe2ad41426ed.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/kaxojejan.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/4289094.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD125 4848 bytes
SHA-256: 535b1264b00327cde3062d073c6b90d9841410f07a07598eebf29e6bf9e64b07
font_01_sfnt_off0000e194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE194 12328 bytes
SHA-256: bab5c6e0e09f40020f2bfb481e90f4a196d8c26f4cdcb798904c0095e53086d9

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