Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85e5d8b7df23e11…

MALICIOUS

PDF

70.0 KB Created: 2020-11-12 21:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e02cce996f8efe296a2a32221352e3a1 SHA-1: 5807bb1a0699df3fbb568c769bb7378af8c57d11 SHA-256: f85e5d8b7df23e1194295d1b484661bed74b1117bae6601b6caea7b148441455
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, including one to 'trafffe.ru', suggesting a phishing or SEO manipulation attempt. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=reporting+hit+and+run+accident+to+insurance PDF link annotation
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/potijizegelenunazig.pdfIn PDF document text
    • https://mesobesin.weebly.com/uploads/1/3/4/5/134590010/jilabukujuxojapikup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_5fa3cea8a489a.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/1ea608.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kirorafagosox.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/1405612.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/ec5b801.pdfIn PDF document text
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/ad041c75698262.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/59cf4bd1-426d-4ae8-91e3-55d35aa24053/nuberebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306e82b4-23b3-4842-bd29-72ae0e7a00fb/sovapixopotorobasajutute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cadad1-ef82-4aa2-b22e-86dd5993a677/a_modest_proposal_common_lit_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff3020a-8b14-46a5-9f9b-2aa648ab69d8/pexizu.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_off0000d3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AF 5312 bytes
SHA-256: 52df418ffcfc80ad4f4f5eb2a5b7ac739315971bd2679bfa66240076e57523eb
font_01_sfnt_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 10996 bytes
SHA-256: 3456582d1a5f853282f5d37de111657a13a708b192f0e710b2260faacde2fef5

Open this report in the interactive analyzer, or submit your own file for analysis.