Malicious PDF — malware analysis report

Static analysis result for SHA-256 2724b90306549a66…

MALICIOUS

PDF

73.3 KB Created: 2020-11-25 02:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a73354065ca51bd6902057b5d493a32b SHA-1: 8d658f8679739104a2f606d964515f3d6f323883 SHA-256: 2724b90306549a667f2a45acc11281fce4f524199405c4fb305115cd80a2e468
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it is a phishing trojan. An external URI pointing to 'trafffi.ru' was extracted, suggesting a redirection to a malicious website. The document body, though heavily obfuscated, contains references to a pressure washer, likely a lure to encourage user interaction with the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=ryobi+pressure+washer+2000+psi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469837/normal_5fb2f1f850c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fb2ded3bb4cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389352/normal_5f985c35ed2a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f87c3099b304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5f953cdf67cd3.pdfIn PDF document text
    • https://kavivapepegag.weebly.com/uploads/1/3/4/2/134235540/nivotekekewijene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f89f8cc367e2.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/bc985635-c6ec-40b1-a214-e3af2af8b2d0/ahmetturan_gta_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ed79a1-87fe-4616-a517-4d4dc90fdd8d/raturi.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/fringe_benefit_tax_guide_new_zealand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84be0e69-825f-4f27-9c29-862d7f1b5733/77615211381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c2f2b1-6a4e-4700-92c4-27ddffcc7868/wigoxisuvigin.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/5759110946.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/slingo_daily_challenge_games.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/nexukekovalawoxebejuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a65083-43e2-4a7d-bb70-50229c468837/tovezumim.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_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 5492 bytes
SHA-256: 4b06be88bfa36e100b8d1983a7ed437df215e67f63ef82b0238445c65c552404
font_01_sfnt_off0000f389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 11012 bytes
SHA-256: c1b13b615cc308f4219a1615c3de4541ee0e6c00abd18636e54d901c34ccf655

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