Malicious PDF — malware analysis report

Static analysis result for SHA-256 426a61b671ccac77…

MALICIOUS

PDF

63.4 KB Created: 2020-11-26 18:35:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7dce60491c602b3041c21af60b91cdcc SHA-1: 8650f7b346497fa650188216721c5fdbaeba56cd SHA-256: 426a61b671ccac77a1fd2ea0f612eae698ceb43d2f2e54c933241748cd195e1a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to the URL, suggesting a lure to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=darth+maul+lightsaber+hasbro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fad74828401e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5fbfd4c88e758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9bca2591-da1f-45d6-8aaa-96f5878ecee9/meaning_of_bottom_up_processing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f778dcd5-6297-441e-bcce-0e2cfb299009/tres_regalos_letra_y_acordes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe99ec6-7b50-4393-b84f-f00a1b86c8ce/79974853352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2daf4e-c41d-4942-8edd-de0206dcd820/93240150108.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/adobe_reader_to_converter_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f0e65c-d1b8-4052-a1d3-f366ab270d62/nba_2k15_controls_xbox_360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385f3dcf-e35a-4615-9701-888703a9b962/37100540910.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/62304122030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a0afe0-0048-4828-b714-e932d7aa7971/microblading_near_me_90810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66badf31-f2a7-43aa-bff8-9a2157f58521/monroe_quick_strut_vs_roadmatic.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_off0000b01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01F 5016 bytes
SHA-256: 6c5756a966988ca6303d79d6b00106262ebab82bb0c2226294aa62bb360f2cd4
font_01_sfnt_off0000c131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC131 9856 bytes
SHA-256: 18300b0e7ba239e7dcd67e75ad05e9793335de76074e32821a1cce4b372ac8e3
font_02_sfnt_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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