Malicious PDF — malware analysis report

Static analysis result for SHA-256 893a7ed3845a8b30…

MALICIOUS

PDF

64.8 KB Created: 2020-11-19 03:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b0d1071fe1dab3786ea1d113d1ef771 SHA-1: 124abbb1699b9ddb8e1a9f4a87867d0a51622e6e SHA-256: 893a7ed3845a8b302ac8340362a86fd5e3e369e60415e06e89c05fef6e8cfbe7
216 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. It uses brand-impersonation credential phishing. 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 0.9998

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.
  • 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://viwekaxirudadax.weebly.com/uploads/1/3/4/7/134700275/wofonuri.pdf.
  • 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/strik?utm_term=vidio+chat+ruletka PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f8ff55c1b7f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5f8eb80b3667f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_5fad3b50ccb79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470826/normal_5fb458241f6a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5fa5595ce94db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5fa43b6209511.pdfIn PDF document text
    • https://viwekaxirudadax.weebly.com/uploads/1/3/4/7/134700275/wofonuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_5f973769d4054.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/regan_puseku_lezuxunaforelud_samotitak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f9118f5d8692.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/57c7cbf6-81f9-44ab-98a5-7995117f0325/3537235077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c11c673-4c6f-4601-afb1-bcd2685cf3b5/ratufe.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_off0000c213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC213 4876 bytes
SHA-256: 572eb9e978ec34f0550cdd03f75a4f6e55fb824b7026cf0bb7594403f07e79f0
font_01_sfnt_off0000d2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A3 10188 bytes
SHA-256: ce8d79897e431f73a2c94702478d00cd5753c1ba1a0d1caccc78b7a1322ec82c

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