Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc90e3ca4d2ef17…

MALICIOUS

PDF

72.8 KB Created: 2021-06-03 19:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: acaa07bb01a35d690455f8fd067730ee SHA-1: 7cfc29fe00b85b927b1a4d9d3176d036d1feb5cf SHA-256: 6bc90e3ca4d2ef175b4290a9bebf155c19165feadbd469c5bb5461182bade89e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of embedded links pointing to external websites, a technique often used for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://irlanc.ru/pbw?utm_term=why+google+is+not+working+today PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459166/normal_60240ff7ddaad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_6022e4535f498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461748/normal_5fd92004db436.pdfIn PDF document text
    • https://rajoligegade.weebly.com/uploads/1/3/4/5/134504333/tosumafonukokonuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_6032c4fea2855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412758/normal_6009450ce9ef8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481424/normal_5ffa16a23555e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405208/normal_5ff40ea555283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_6046ccd24ad1b.pdfIn PDF document text
    • https://benikadavax.weebly.com/uploads/1/3/5/9/135964790/32052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5fea359cb2448.pdfIn PDF document text
    • https://kiwuvewe.weebly.com/uploads/1/3/7/5/137509443/2599366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_60216fca6cb21.pdfIn PDF document text
    • https://woxawilafuzuve.weebly.com/uploads/1/3/4/6/134669094/regaj_supowavofisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_601fd1d9782ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fdc7baa2dd0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_606c092f7a860.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/crasher_origin_mod_apk_terbaru.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/fatezaxoxoruzolazezope.pdfIn PDF document text
    • http://jitijaloj.pbworks.com/f/8567152473.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 7

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_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 5360 bytes
SHA-256: e66053ad0ab646e29446d9297788f76c9aca4d171553c68541063ebce96cdd96
font_01_sfnt_off0000efb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 11100 bytes
SHA-256: 3a338816b8b54e8374aa4807d9767465490fe6a61a1f5787b8aebe314cd505fd

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