Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5c23db59862b00…

MALICIOUS

PDF

65.2 KB Created: 2020-12-23 10:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5dd24d062094bfd4cf457cfad2d9b9f1 SHA-1: 84e670ae31477f3b14b1f038dd2c6ed1fbb99216 SHA-256: 2e5c23db59862b004b2cbb0cf96488b0f9ef7abbb2fb2d9beb5e6ddef621a92b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://trafficel.ru/strik?utm_term=snappy+salads+locations+near+me', is presented as a search result, likely to deceive users. While no scripts were explicitly extracted, the PDF structure and the high ML and ClamAV scores indicate malicious intent, possibly related to phishing or distributing further malware.

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://trafficel.ru/strik?utm_term=snappy+salads+locations+near+me PDF link annotation
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/f472bf3.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/7767590.pdfIn PDF document text
    • https://lurefeti.weebly.com/uploads/1/3/4/6/134683691/woxaverutekadeto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f93c0a21a59a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5faf519ce92b8.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/8f8bc0212.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/51578.pdfIn PDF document text
    • https://xesapidad.weebly.com/uploads/1/3/4/3/134346602/widozologus_rapobosaj_powol_pederareg.pdfIn PDF document text
    • https://nezuwiwobitedut.weebly.com/uploads/1/3/4/6/134600585/35256b5795e9658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_5f98b1590c6ad.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://uploads.strikinglycdn.com/files/7bf7bdcc-e3a6-4e67-94a7-d8cb0f9d829f/91575371687.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB367 5212 bytes
SHA-256: f2ba796378eb8852584b82e855524e84a20badec06a9fcc7cd86567127f3ebe5
font_01_sfnt_off0000c500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC500 10968 bytes
SHA-256: a026f390dbfd9832abb3fb80e4792a394fd19a3280d2dca57243f488e76c6894
font_02_sfnt_off0000e9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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