Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba5c6b3ae83acaa…

MALICIOUS

PDF

76.5 KB Created: 2021-01-15 07:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7e8a445310a58b6a5d0c1166a3d92531 SHA-1: bf9faa5190d3cb2fc751bd054968e733b6235834 SHA-256: 2ba5c6b3ae83acaab6c2ef43010d6fc683382c80709bba61b5365edde012aa6a
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, and contains a critical number of external links. The links point to a variety of disposable domains and Weebly-hosted PDFs, suggesting a link farm designed to manipulate search engine results or distribute further malicious content. One URL, 'https://gettraff.ru/aws?utm_term=template+for+glinda+the+good+witch+crown', is flagged as a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=template+for+glinda+the+good+witch+crown In PDF document text
    • https://jazazigiw.weebly.com/uploads/1/3/1/3/131398077/mebaxefagivelo_minut.pdfIn PDF document text
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/1ad3e73973f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fff6ee4ae08f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_5fa2760fef64e.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/biaa0je/crash_of_cars_game_free_download.pdfIn PDF document text
    • https://site-1177610.mozfiles.com/files/1177610/modern_home_design_house_construction_games_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fe88d453b39e.pdfIn PDF document text
    • https://site-1200721.mozfiles.com/files/1200721/nfl_scores_11_29_20.pdfIn PDF document text
    • https://somanenor.weebly.com/uploads/1/3/4/4/134472611/zozema-teguzalidasaf.pdfIn PDF document text
    • https://site-1175927.mozfiles.com/files/1175927/dagab.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/17c18893c8cb800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fdc72dd332b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5fcc98b497f7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f87c1a445d7c.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_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 5432 bytes
SHA-256: 182a8bc81f9be0c01b25b4fcd7d3451ad9de6d49dc4362f62167b00a5574662d
font_01_sfnt_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 10860 bytes
SHA-256: bf7ce912cb0d123a661d9f35381d3aaa88424e4c330634c745ad8ec876c580f3

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