Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96421f0397d9324…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 02:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 80fc3e97d04a2f7125142ec73cf5c944 SHA-1: c11ee581f47d3735dcc2d4965656b13d4da1ebf0 SHA-256: a96421f0397d93247d92ddf96f7db5469ac43ff6b6ce91280d8086caba4c7c8e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm designed to direct users to malicious content or phishing sites. The primary malicious URL identified is https://botokaw.ru/strik.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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=the+betrayed+ending PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402718/normal_601f45d9c6dce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_5ffd294d295ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401976/normal_605be6461f7d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_602a30e21cd22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_601cb204b65ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_6014bfebf0b12.pdfIn PDF document text
    • https://ragesetenavuxom.weebly.com/uploads/1/3/1/6/131606186/a20852db03c6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fed7390cea9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408471/normal_602be2c1d25b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490542/normal_5fd0e5e5d0949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_6022a593ba8f2.pdfIn PDF document text
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/02efad2723a102e.pdfIn PDF document text
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/1642813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419195/normal_5ff5583777a28.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/wafafigux_wupasupen_sukeramubelalod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486060/normal_5fe06d45c7958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_605bab2d9c03f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5ff5b70c7ab1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5feb9c19d2541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fe731e0f20ed.pdfIn PDF document text
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/vamatuxoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_60493145ef264.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70B 5068 bytes
SHA-256: c69be65dab48d92cd4c8fcb1b5ba7201f72c4f0aedcba975b6ef319f85c47ca2
font_01_sfnt_off0000f83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83B 2128 bytes
SHA-256: 18f47e14b033b9868918b882439b75cbf81e22a18dc542528a66a0b8b339fdc8
font_02_sfnt_off0001020b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020B 10740 bytes
SHA-256: 4028a7b015ed0cd0407f8c8ee12b8d37ecb568b3f7a63af4b52c261496efe818

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