Malicious PDF — malware analysis report

Static analysis result for SHA-256 6021989d41d20cc5…

MALICIOUS

PDF

67.3 KB Created: 2020-11-28 02:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f5c3aed03743a9a2682d9db3ccf99276 SHA-1: 498703d0f9b2adf69e1b8efb6921d9ede933a1da SHA-256: 6021989d41d20cc550ccce5417a33692c2933ee1f202d2ef59afcb21d356b8f2
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 URI pointing to a suspicious domain, traffset.ru, which is likely used to redirect the user to a phishing site. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL and the strong heuristic detections indicate a phishing attempt.

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://traffset.ru/123?utm_term=acura+tl+owners+manual+2006 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f86f6e213569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8edfc4bde2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_5fa36ca10b65b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_5fa9206bae75b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_5fc186d7db443.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/vedexajawo/sisizifobazifet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c51ab6-f154-448e-aa7f-f98c7e812598/xagomusivisemopivafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af574686-0c86-40bf-b17b-6bc80ded7320/2609191376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1988253-9675-4d77-815f-1e7b57d89b97/xewirapug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f23e87d-e2a2-49b2-9aad-eb0f8fd9cd29/zifasoxewifesifix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69ede3b-06a8-4bec-8888-93a7bdc961e6/dragon_ball_meaning_of_symbol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b25128c-fc2d-47c4-a46f-0d8ae5f521a4/cash_cheque_payment_voucher_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae2abf4-11b7-4277-876d-cb5e0c0e4a26/mejinupujipatukavaga.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/answer_me_the_band_s_visit_instrumental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c116b234-ec0a-4991-8a17-3690ab954c8b/32732439218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2975b863-a71d-492c-8cae-71058f8274f1/21310172308.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_off0000c84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84B 5456 bytes
SHA-256: d691b2541b40fbd3076e7905f2f4fcebe9bbf646b575839501ebd6a9c9ce37a0
font_01_sfnt_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 10992 bytes
SHA-256: 34d1777e79e5ece4aca1e59074464394778b043591d8779a2aba6e2c16048e05

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