Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86fb3264f0477e5…

MALICIOUS

PDF

101.2 KB Created: 2021-03-17 06:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9bc12aa4f1d99b00d2081d2de1f50fba SHA-1: ac2fcb3d2242ac8b21abfe27882d526d49a94fcb SHA-256: b86fb3264f0477e5c0caa18952ca73d0f7c815734a8409e552ee856f0978920f
186 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, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/wix?keyword=acheron+pdf+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464053/normal_604fe060acda4.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/dutuzoleperu_ridaberilewan_jezifab_wosuru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_6046e4cc203e4.pdfIn PDF document text
    • http://fuxakuzaporelu.iblogger.org/loxopo.pdfIn PDF document text
    • http://disconto50.pro/lopabar9zx.pdfIn PDF document text
    • http://nofawemew.iblogger.org/wuvaroxirukoki.pdfIn PDF document text
    • http://mgacessoria.online/wewukulapevezuli24exw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5ffa931db61fb.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/2549844.pdfIn PDF document text
    • https://relelije.weebly.com/uploads/1/3/1/4/131438324/manoxonosajadinikodu.pdfIn PDF document text
    • http://masalev.ru/zupuxenamajefujulao9seg.pdfIn PDF document text
    • https://kuduxuke.weebly.com/uploads/1/3/5/3/135323303/8009017.pdfIn PDF document text
    • https://baxemazone.weebly.com/uploads/1/3/0/7/130739829/xewipiremig.pdfIn PDF document text
    • https://wuruderow.weebly.com/uploads/1/3/5/3/135389815/3946374.pdfIn PDF document text
    • http://bewelaxoludiw.22web.org/livre_anatomie_humaine_gratuit.pdfIn PDF document text
    • https://xofudafitigo.weebly.com/uploads/1/3/5/3/135327781/5574062.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_0f0906cc2c27461aaeb90ac33ec8d7cc.pdf?index=trueIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_1808c89d52cd468daca4a99068c0e007.pdf?index=trueIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_fd823432e02b4824935a74efa63cbd65.pdf?index=trueIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_62dd14d095ea45f793ae4574752c13e3.pdf?index=trueIn PDF document text
    • http://batijobiso.epizy.com/74024736826.pdfIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_6aebb238c0f14ed6a249afe5ed174faf.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001407e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407E 5160 bytes
SHA-256: 5f579e4a594d774d38a07da513219686ab4abbb4667b7f6ffdf3d858bed92ce0
font_01_sfnt_off000151fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151FA 11616 bytes
SHA-256: abbfc2a59dbb687026f1d0957cf541fcd33d47f0a24434c6152d87b323b643f5
font_02_sfnt_off000177c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177C9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2