Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f67798282c967a…

MALICIOUS

PDF

63.6 KB Created: 2020-12-24 21:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7e0aa13289cd1fb161a2d564b5375cb5 SHA-1: d5b85e699aef502d7136e5773b0bc7965430a68f SHA-256: f1f67798282c967ab7560805a0942a62f62477aaf0b58bd0838bb94a40e54fdf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary URL, https://traffnew.ru/strik?utm_term=vestige+marketing+pvt+ltd+best+deals+store, is likely the destination for users clicking on links within the document, aiming to direct them to a malicious site.

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 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://traffnew.ru/strik?utm_term=vestige+marketing+pvt+ltd+best+deals+store PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474205/normal_5fb9e47f09261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5f980179d98f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fd662c978138.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/jeXJjdq/big_circle_color_contact_lenses.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/1qkuhcM/dodiwinabavuwanubepe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5fcf6a0b01249.pdfIn PDF document text
    • https://zenovoruzunej.weebly.com/uploads/1/3/4/3/134339910/xazuxinokapa_dijokudutawinaj_navaf_besoxokoxadakeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fd9d4f773ad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fd610505f90f.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/85981599-9938-4305-8a31-e795de787732/mepoloviviwiwomerekipugap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb4951e-ba01-4734-a5b0-ff0736216071/straight_talk_home_phone_user_manual.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_off0000bb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB01 5508 bytes
SHA-256: c16fa9bcf25f87c09aa10f371e18f6a859dedd1c2d6593d7fbe2d6cbf245691d
font_01_sfnt_off0000cdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAC 10628 bytes
SHA-256: 7301e2b6828ee120814b8f6015cadf6c1d93121b8549404dc040ebae54afac84

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