Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b16267d9083b72…

MALICIOUS

PDF

92.8 KB Created: 2021-01-03 01:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0791f0defaaf758ec2556501a79430b7 SHA-1: cb0db3bbc1ba9e0c01b2ca3cef11927753f1b8e8 SHA-256: b6b16267d9083b72e14bdb5542020eb37404df90f74de270afa1616e933fa76c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to a philosophy PDF, indicating a social engineering attempt to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=ethics+and+the+limits+of+philosophy+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8e579649d0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f9f9d36e9778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367625/normal_5fe559f423029.pdfIn PDF document text
    • https://cdn.sqhk.co/dabeluza/ifhbifD/falulejugusadebozi.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/71Xgeie/31919226472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f8c6d44ef8ed.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/giexgdp/hyperspace_mountain_paris_loop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446378/normal_5fb8ce958bf34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luropi/web_development_course_outline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a95353-3939-472e-85bb-a3f63771ed7b/6225742708.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/92059256088.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/75346104914.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_off00013077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13077 5360 bytes
SHA-256: 24c376b85b4a1036abcff3686cbcd335182e49e4c3f81f63262bdd21fd8b3eda
font_01_sfnt_off000142a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A1 10352 bytes
SHA-256: ce564eeb43cf8ba85b9f2fd384cb4e35e0afa2a81ca94e9873e62885d10d7a60