Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8e597426b79c64…

MALICIOUS

PDF

78.9 KB Created: 2020-12-16 09:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1fc62a0fa4cee68c1434a4541c31f52 SHA-1: 1c737b657f047503d1f5535a3c0b046bb531bc18 SHA-256: 2f8e597426b79c6420577fb9e7275b9e31a82b3d070344e9760b1e551e104cd9
156 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 of which are likely part of a link farm designed to manipulate search engine results. The primary malicious URL identified is 'https://traffine.ru/strik?utm_term=olangal+malayalam+movie+watch', which is likely used to distribute further malware or conduct phishing. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=olangal+malayalam+movie+watch
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/zebizuvabimubexa.pdf
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5f93de338b14c.pdf
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5fbee69dd8426.pdf
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f8ff50d7e292.pdf
    • https://cdn-cms.f-static.net/uploads/4384323/normal_5faaaaba71158.pdf
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5fd95855152e8.pdf
    • https://cdn-cms.f-static.net/uploads/4499021/normal_5fb39ae3bf0af.pdf
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5fa198d752332.pdf
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5fbc5a5a62ba7.pdf
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/guzuge.pdf
    • https://static.s123-cdn-static.com/uploads/4401505/normal_5fc890b94a7bc.pdf
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5fc8d2b94330a.pdf
    • https://cdn-cms.f-static.net/uploads/4452217/normal_5fa2935566477.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kizugokofo/google_sheets_conditional_formatting_based_on_checkbox.pdf
    • https://static1.squarespace.com/static/5fc28eaf9698b02c7f2b2aca/t/5fd0973e3bcf75077a85de5f/1607505727023/motorola_razr_2020_price_uk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f82f.bin
512498466b97ecf006949f719bc7c0d63fb8524752a215ba202952f747eb852d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF82F 5220 bytes
font_01_sfnt_off000109e7.bin
9c85412a61b5aea3bf7b35cddc3735d067dca43c122acfb2a68ff5c9758bc1ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x109E7 10952 bytes