Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08eb87283446ddf…

MALICIOUS

PDF

72.3 KB Created: 2021-02-26 21:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c033ebceb162653c5fbfdd1450f10c8b SHA-1: 9e7c253aa2fda0ccb568f41fd0935aeb527c11c3 SHA-256: d08eb87283446ddfafffa3f7a63650a4ddbf021464ab8bfc27c16d4ae3e1d77a
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-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://botokaw.ru/strik?utm_term=how+to+clean+philips+norelco PDF link annotation
    • https://cdn.sqhk.co/jelivapizivo/gdRRnhi/zombie_apocalypse_organisms.pdfIn PDF document text
    • http://meetsoda.club/vavubituritekuwojogif78xtk.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/ihHjagc/21188856085.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/pezabisaragafo_kefeli_nabevipu_jetukubugurit.pdfIn PDF document text
    • https://fukuperuka.weebly.com/uploads/1/3/4/8/134883813/2c36bb3302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_5ffb35ac06b7e.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/hbjh0l0/jekilulok.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/igfjdje/56328073106.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/betefajad.pdfIn PDF document text
    • https://renokogepebamon.weebly.com/uploads/1/3/2/6/132696434/wonevavap_jofatonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470837/normal_601b7bf5185d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 5076 bytes
SHA-256: 27bb7858c704b9b545342b2d972b190b6cb75dda70a925e66121fc13d891d2f6
font_01_sfnt_off0000f05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05A 10596 bytes
SHA-256: 88972c233f0c1a2867ccc406fdff973f5467964ff2904697278bf7758458692f

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