Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf0787fe8689b10…

MALICIOUS

PDF

179.5 KB Created: 2020-12-16 07:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1ef19e280c16bf24f2e00242dc341a95 SHA-1: 1f0bf9d5a4c76f3e97e393a8446ec41a5ae6a5ea SHA-256: cdf0787fe8689b100e34c04ed7d4eedac652dec40cea1ffcc7d1dc48769149e4
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing page. No scripts were extracted, but the presence of the external URI and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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=tv+tropes+castlevania PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404285/normal_5fbd120970e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_5fa4a5867e54b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f885c421fa8c.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/524787da-674e-4a38-8045-1f5fbe6d4713/84030971189.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/juvazefixabadifojon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d11b26e-23a1-4ec3-8371-72e38cdcd11c/puzad.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/bolero_gadi_game_ing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf32f13-6aa5-4b3b-8919-48dd57178409/lasizosazapafisisurojilok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f49c47d-c6e4-4eb5-8aa6-a2f74ce49c6f/34932839837.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/pants_size_guide_cm.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27D61 3244 bytes
SHA-256: bd369bbb0c849137f6bde57faf9ef89d2fc821d279a6e83a64f8062800e4a7b5
font_01_sfnt_off0002891c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2891C 4936 bytes
SHA-256: d60bedd440abc7d6e4aa61467dc50994414c7fbeb58625a413aec767b563913e
font_02_sfnt_off000299f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299F9 12012 bytes
SHA-256: a2d0e793fb0aa60f4bc5204744db60b0f6272937d35826a758e648d3dab8b78a