Malicious PDF — malware analysis report

Static analysis result for SHA-256 e261430a8565cca4…

MALICIOUS

PDF

84.7 KB Created: 2021-01-08 18:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 426830d7cfc18f7576ced9251c801f39 SHA-1: 7303eb43adc816ebf97a195a3c4410c016d0a77c SHA-256: e261430a8565cca4e4cd9f448ab8d6da9fb0b8bbaa1afdbb7ae76b01c681bc2e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier assigned a high probability of maliciousness. The embedded URL, https://trafffe.ru/aws?utm_term=philippine+navy+battle+dress+uniform, is likely used to redirect the user to a malicious site. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing attempt.

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://trafffe.ru/aws?utm_term=philippine+navy+battle+dress+uniform PDF link annotation
    • https://cdn.sqhk.co/tororukiwuri/ibihujj/universal_kids_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420608/normal_5fe10337674e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447630/normal_5fcb20dc903c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_5fbba8dd3eb6d.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/cNiiijb/ironmaster_cable_tower_attachment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_5f9babf863369.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/S7N7ANI/rap_beat_maker_app.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/iayCACB/fewenugupizirirawewetudol.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://s3.amazonaws.com/rovikibixu/vitepolonizirojuri.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/tivafatupaxilesepebuzas.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/stihl_pole_saw_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/bemuge.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/pol_237_purdue_exam_1.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_off000100f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 5464 bytes
SHA-256: 990bb31deeb15c9330bc4beaf00f1e66ad8570f98e0ce42c1c0c981cf36b62b5
font_01_sfnt_off00011353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11353 10568 bytes
SHA-256: b0c54482572d8e7ae4a6ef0b46a137cb6f5f00fe4c36ccfd9e524dbf8a0969af
font_02_sfnt_off00013785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13785 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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