Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f85a78e7fcf6a1f…

MALICIOUS

PDF

68.2 KB Created: 2020-11-28 07:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6aa4a8d9d3459c74ff0a0c8c81c74a8a SHA-1: c5454a2b2b50102b0cf80e9cc37d6f6ad2cc1ce4 SHA-256: 7f85a78e7fcf6a1f86e54562b551e73b86b7ab3a4e9e2d50d4b8a55a00203bc8
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to 'https://traffine.ru/123?utm_term=recorder+karate+songs+with+notes', which is a strong indicator of a phishing or malicious redirection attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=recorder+karate+songs+with+notes PDF link annotation
    • https://wajugipime.weebly.com/uploads/1/3/4/6/134646119/jukogadove_ninum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f989e44a5625.pdfIn PDF document text
    • https://nujolekilerimiv.weebly.com/uploads/1/3/4/5/134501562/2114115.pdfIn PDF document text
    • https://nofevezim.weebly.com/uploads/1/3/4/7/134770192/717667.pdfIn PDF document text
    • https://jokuvaput.weebly.com/uploads/1/3/4/5/134589987/9954248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_5fa63ea4e4e07.pdfIn PDF document text
    • https://mijebekebune.weebly.com/uploads/1/3/4/0/134017127/mosudoxuvonepe.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/2f743ee2-5a40-4f70-90fd-0ede23304a00/fedovopirotajideterirexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32da91f2-3903-44b6-b9d7-1458d0d33ccb/solezakolowufedawebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f25e74f-ec8d-4042-aaf6-9e4126ac32e2/nevaruzidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d41fbe-5bea-415e-813a-7c6d15821d53/48683830081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae86032-e732-4861-9fd5-b21a3726752b/tank_trouble_multiplayer_online_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a0f13a-583e-4f23-b8e6-96785aa158c2/kings_gold_keto.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_off0000ce87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE87 5332 bytes
SHA-256: 37f231dc0b8895f5a2d93c23749752de6293c847456e2b549fe71ee2f2ae20b3
font_01_sfnt_off0000e0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BA 9816 bytes
SHA-256: e1d09de83614196267287afc6f741a9ccb88b1a61fea7116beb1cf74ad8f87e9