Malicious PDF — malware analysis report

Static analysis result for SHA-256 8347d1906f03d48f…

MALICIOUS

PDF

68.5 KB Created: 2020-12-21 22:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8b9e6c058fa0a771404efa72ca7fdcbf SHA-1: 6793c85001eca0d15a31d10660d9871b6fa58638 SHA-256: 8347d1906f03d48f841fac76497855987fd1951744f0ada0ac12b0316f3222da
246 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as a credential phishing lure impersonating Microsoft. It contains a mass of external links, many pointing to disposable hosting, and leverages a redirector to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to harvest user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pumewigegokofav.weebly.com/uploads/1/3/4/3/134317234/623185.pdf.
  • 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://trafffi.ru/aws?utm_term=user+journey+map+template+tool PDF link annotation
    • https://pumewigegokofav.weebly.com/uploads/1/3/4/3/134317234/623185.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/xonodisenototag.pdfIn PDF document text
    • https://mejebogisoxofix.weebly.com/uploads/1/3/4/6/134606558/868dcf794.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/9035011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5fb78a8ceb72e.pdfIn PDF document text
    • https://fikamuvereza.weebly.com/uploads/1/3/4/7/134754658/5891707.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/761d342fbb.pdfIn PDF document text
    • https://zofisafewo.weebly.com/uploads/1/3/4/5/134508124/lavekizodes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f3193c-7135-4bdb-a255-b638fd18da7b/werivovululidi.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/kexufamorofodivodefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc97ab5-bd52-4b6f-b432-61a743b3b17f/twin_points_park_-_trwd.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_off0000ce5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 5136 bytes
SHA-256: a25b14d16a49c5943384ac87217ae4ffb4b4bc3843b0c05b6c10b959d936d50a
font_01_sfnt_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 11000 bytes
SHA-256: 8f921641c4e750c36ea7589d1addd2c9752042f33ac61aff95dc6e1446633758

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