Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1e819dca0577d2…

MALICIOUS

PDF

68.9 KB Created: 2021-01-14 11:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: aab937b87767a56a4bae0535e18db3c5 SHA-1: aabff86c478eb9be351619f8429df919bd0422f7 SHA-256: 5c1e819dca0577d2ca2367567efa4baab56ff96816d6266650b7aeb9416d43c2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, with the primary one being 'https://trafffi.ru/aws?utm_term=date+sheet+ba+2019+iub', suggesting a phishing or credential harvesting attempt. The presence of PDF-specific malicious indicators and the high risk score further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=date+sheet+ba+2019+iub PDF link annotation
    • https://cdn.sqhk.co/jesupasuzoku/uGiawib/pixel_car_racer_pc_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486190/normal_5ffea84a18c97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5faa3ab0b169c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491670/normal_5fb026633ff3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_5fa358819a8e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455645/normal_5fc1f1cb2bd0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_5f9e2691892d2.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/XigD6On/30347277404.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466657/normal_5fffe129395a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458390/normal_5ff9c7f8dfa47.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_off0000cfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDA 5268 bytes
SHA-256: 9409b3c5f9e01a511bfdcf229904e25086d77dc8df6044b94b3f3e127c252382
font_01_sfnt_off0000e1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 11956 bytes
SHA-256: ae330b38887a1cdb8acc23870c1b90bffdcb210000f7ca1acd1dadc89c6797a9

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