Malicious PDF — malware analysis report

Static analysis result for SHA-256 176c968b69396c07…

MALICIOUS

PDF

68.8 KB Created: 2020-12-23 00:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d81ec42bd2811b354ded25d41ad2169b SHA-1: 2453631fb22e3d50276abca058253655476fd631 SHA-256: 176c968b69396c0715ab1cb3038fa6eddb36969e5d90e2da9ef14c4ce7b29800
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffking.ru/123?utm_term=oregon+driver%2527s+manual+2019+pdf PDF link annotation
    • https://pixuvanibodaw.weebly.com/uploads/1/3/4/3/134374857/jegizumereku_kavunitovu_zatugaju_bodabagu.pdfIn PDF document text
    • https://mewetoliwuluveb.weebly.com/uploads/1/3/4/7/134767879/dunuxa.pdfIn PDF document text
    • https://feverawujebuv.weebly.com/uploads/1/3/5/3/135314909/boxiz.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/wisen.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdfIn PDF document text
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/f35f9b40c18632.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/1053110.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/8855a933-df96-4f81-a0a1-66c7e2ee8643/ragtime_gal_rap.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/dolipopuwolezuruje.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/47727867368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4b058b-2c12-4088-bec4-be9a2b7948a8/47453159216.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/falorubewatejujobimibu.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_off0000cf1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1C 5964 bytes
SHA-256: 4c0bcb8b38448b794cbfaf75d8ad20484989ff15b3e4d97072626fe364aa1a1d
font_01_sfnt_off0000e362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE362 10272 bytes
SHA-256: e03fb1a2060bda0d11981e1cfb772e864904ed6f02c9fce7901bd637a41545a7

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