Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0b175a044a2868…

MALICIOUS

PDF

69.8 KB Created: 2020-12-17 23:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f88320f63ce427f4ebf2c2288ea505a7 SHA-1: 93d402bb54a0287d07a486f224628cabd35a9ce2 SHA-256: 2f0b175a044a28685070c9b61a732ce57c4b0183fc334fb4723812843367d514
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 5

  • 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 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://trafftec.ru/strik?utm_term=robert+graves+greek+myths+pdf PDF link annotation
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/b2e558f3009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f93c984d2565.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/xoxiditag_tebeg_rawoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f8e666097ac5.pdfIn PDF document text
    • https://wivoximuvekobug.weebly.com/uploads/1/3/4/4/134473281/0048edee4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_5fbf53266d0f3.pdfIn PDF document text
    • https://xiridibokolu.weebly.com/uploads/1/3/1/3/131379099/7738403.pdfIn PDF document text
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/tawumepuj_direbarubu_pigimel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fb60f844bc6e.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/vumizutiwetox-tijod-vunevazan-najobivifam.pdfIn PDF document text
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/87d6be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f9ac62ecf52c.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/088371eb-3d2d-4675-aea7-f262722343fb/62539683051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e89d3a-e48c-4d4f-aca8-013fe989a4f7/1455761061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104691e0-5c55-4806-b0ee-3ff24bb08f7f/pisokax.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_off0000d1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 5796 bytes
SHA-256: 70605c890a49f2186fe4da93e4b7dd217d7c2fc9a8b92f7c3eef0ff83ddbab1d
font_01_sfnt_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 10888 bytes
SHA-256: 045176f55dbfc1c7ccad9dc231eb5225c9cd4e8ec5829f531bef8e194b28b3eb