Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a8ee0c98a9c311…

MALICIOUS

PDF

77.1 KB Created: 2021-03-21 11:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7345d7725943925d1ae04473cf383db9 SHA-1: b9345899cd86dbe9e2d56b21a1ea490afcbb3182 SHA-256: f0a8ee0c98a9c311fd4896a6a8cc63d373789f64c74879f01f19120fa9101a48
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be a precursor to delivering a password-protected payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mezovuduw.ru/123?utm_term=shining+resonance+refrain+character+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478131/normal_6000118246008.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/jegemupake.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/gijaibB/ticket_to_ride_scoring.pdfIn PDF document text
    • https://vavulawukuret.weebly.com/uploads/1/3/4/6/134690424/gipazepeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/j6dggAJ/the_art_of_war_quotes_strategy.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/6232885.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/zapalovuzolitazuzufix.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/5948889.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/geVqhjK/data_smart_switch_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_600e0c755ce79.pdfIn PDF document text
    • http://gufutaca3.xyz/971586046910fhi8.pdfIn PDF document text
    • http://wisecreditscore.info/kageju3l7r.pdfIn PDF document text
    • https://nesurufaratetud.weebly.com/uploads/1/3/1/4/131408203/9973046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462344/normal_5fdbc4f5d4123.pdfIn PDF document text
    • https://ninuwekij.weebly.com/uploads/1/3/4/6/134625354/ziwoleminuzep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485930/normal_6046f5ac229f0.pdfIn PDF document text
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/lojurabowum.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/deontology_and_consequentialism.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/556090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/45485973405.pdfIn PDF document text
    • http://gixufedexakav.atwebpages.com/sbi_card_statement_password.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_off0000f09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 5356 bytes
SHA-256: 57456e8bd7b1091d5aacc605ef6124b8ce8d18e73d21992f53186396bb2573c9
font_01_sfnt_off000102cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 10576 bytes
SHA-256: 02bf288be779e4ff45158a0c33b343784c745d9e7b8369775c0680c82472c5e1