Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4dd408215bc489a…

MALICIOUS

PDF

72.0 KB Created: 2020-11-18 19:26:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 980bebbf0fa4fdef06e51eb83a63e8e9 SHA-1: 1b24e4367c501acae812c500f266bd89e2fb6f93 SHA-256: a4dd408215bc489a27761a12a9da5088282813f3c5587238e52caa158717296b
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 'https://trafftec.ru/123?utm_term=gowise+usa+pressure+cooker+troubleshooting', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to 'Gowise usa pressure cooker troubleshooting'. No scripts were extracted, but the presence of an external URI and the malware detection strongly indicate a phishing attempt.

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://trafftec.ru/123?utm_term=gowise+usa+pressure+cooker+troubleshooting PDF link annotation
    • https://fojejebub.weebly.com/uploads/1/3/4/2/134265807/texux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f93ee2249bcf.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/japunosolefivow.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/2106349.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/1221423.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/b32d7433-5a5b-4805-a8a0-53e979160a0c/song_for_sienna_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91850135-a783-4334-aa95-7358e551236a/jewexinabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdd3071-d816-4ba4-bf4c-ef92a1479971/z3x_cracked_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf79df59-d029-4295-9e33-4c5c66a11dc5/1922931192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53e8a211-f301-4756-abb3-50920d398f9b/learning_good_consent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3f3134-24cc-4890-99d4-d2c42628fea9/84115909160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1c9314-7ed6-438f-a16a-9102ee7b3dd5/9151951725.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_off0000d18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18A 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off0000db93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB93 5520 bytes
SHA-256: 58b2b6cf171d51795b180937f990e93e1975ea8a70b31fca979bc301be27a47c
font_02_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 10668 bytes
SHA-256: 5c76ae6566327128dd17916811a94bad16a31ec0b920d7735b8d03889389fa4b

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