Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e53d2e69d61dab…

MALICIOUS

PDF

75.7 KB Created: 2020-12-19 07:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7be680432d2311db6a0a763e95265b3e SHA-1: eb78b6352d4be2ae738f7e5e94544da77ec97280 SHA-256: 16e53d2e69d61dabbbe61f8ad76bc3b67c88e4df00efc601294fd85f2beb9bba
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'trafffe.ru', which is a strong indicator of malicious intent, likely for phishing or malware delivery. The PDF structure itself does not contain readable content, but the presence of the external URI is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=anger+is+a+gift+meaning PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/nezabajogikili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ca708a-6e63-4d83-916c-e20fbb268423/togaxemirepavepawivelavif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf1585147b14804f7f159/1606283610289/50353287438.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/adverb_clause_test.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/missing_angles_of_a_triangle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/breakdown_tom_petty_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc663662e537a05ef2e8a84/t/5fcaf1148dcc5603beeadbd5/1607135511438/66644821702.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71b81849d1727bc10aae0/t/5fcaa9200e993f2b0655b8be/1607117089199/75471652415.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78cb91969b523a421460e/t/5fc92012348331349f228cfe/1607016469490/nuboganumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ab458c-a8b4-4800-91ed-851770f0b88e/how_to_solve_a_polynomial_inequality.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/luzabotosisubuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f01ea38-d676-4c41-911d-bf9c3cb35ad9/3880189405.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_off0000ee1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1C 5044 bytes
SHA-256: 6e71a8e068d99ef45c584ec0852b293428863ec8df9508bb13431f53820c7f42
font_01_sfnt_off0000ff37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 10276 bytes
SHA-256: 471891c78719c30cc5730e1f9caa186a98796ab48320a80a77f962c5f013cf69