Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd246a242bdfa0e6…

MALICIOUS

PDF

67.7 KB Created: 2020-11-17 20:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1a8490bdc9b3a4d29fea2118cda10df8 SHA-1: 47da432cb506dd9c215f761d81f7618e87c2ef7a SHA-256: bd246a242bdfa0e633a9db72a5282cc1c9697c74ba7340207c8b285b77a9dde9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffe.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, appears to be related to search results for a song, suggesting a lure to entice users to click the malicious link.

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://trafffe.ru/wb?keyword=harmonize%20never%20give%20up%20song%20%20video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450513/normal_5fa0927d38925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5fa1ece165ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_5fa07a8b96493.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/bikebuduvud/dirk_strider_x_reader_fluff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb32021c-a524-4a99-99b8-49cb05f8f1d5/18353010236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4990250-669e-48aa-861f-7c254edd3c19/download_mini_militia_mod_apk_in_pink_colour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cb1f89-fcb8-46f7-b1c9-727223b07bb2/tijirixomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adf7ada-e2af-44e2-af64-9acfb2216739/sharp_p6000u_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c927cb82-0060-4f99-84ba-e029951fa089/lotubijonirevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8743453f-8d1e-47fa-a7ed-54541b376909/middle_adulthood_age_range_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/cengage_chemistry_for_jee_mains_free_download.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_off0000c86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86D 5316 bytes
SHA-256: 5f1e51d401fd4bbcf52cc4e65eef734a1191479f14e4e97c5570a5cadbc071f5
font_01_sfnt_off0000da77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA77 11320 bytes
SHA-256: 5b199cf35c739c2263f73d6cf9511f4703e6a4e3a2e8b1f7acaf10fda5668f2f