Malicious PDF — malware analysis report

Static analysis result for SHA-256 7679de899964a419…

MALICIOUS

PDF

73.6 KB Created: 2021-03-14 09:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1aa342282510aa3d82d4367ba6aae541 SHA-1: 67e02855565e578471cd0b952e28e8cd631ddf2d SHA-256: 7679de899964a419dfad6c8a939fbbfc531a2349cc112fb734ea475da0711771
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used for phishing or to host malicious content. The document body, though heavily obfuscated, suggests a lure related to 'Angular js tutorialspoint pdf'.

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://mezovuduw.ru/award?keyword=angular+js+tutorialspoint+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392463/normal_60135f100e8fa.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuluni/gcheohc/32688782281.pdfIn PDF document text
    • https://cdn.sqhk.co/tedogegez/dWgevic/cost_to_wash_clothes_at_a_laundromat.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/x6l4gcp/hungry_fisherman_restaurant_southaven_ms.pdfIn PDF document text
    • https://cdn.sqhk.co/sidigodoga/pmrShjV/lumaxubodalomifilinigixu.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/f4JijXF/medebexamotog.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/w1d0uig/noxumabifejap.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/bjdjhfL/33941813772.pdfIn PDF document text
    • https://cdn.sqhk.co/gimiraxu/hhieghQ/bavudobugenizapukoze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470961/normal_5fcf66065a0d0.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/bokofapig/85240333488.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/ruvotenepuvegesorokaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d0a29b-07b6-4089-afcd-f92b9d47532e/how_to_clear_codes_on_maytag_bravos_xl_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e89dd82-980b-4daa-9fd6-75b308fef4dd/holy_bible_english_standard_version_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/informal_diagnostic_testing_assessment_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc542be8-c0a1-4df0-a7af-d6b4d5adc2c6/fomuvubujawevofofezizo.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/antique_furniture_styles_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3449d2-c9ab-48bb-adea-dddaee427996/gasoxeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d2795c-89f2-4f83-82f6-e802a7e5acad/kenmore_sewing_machine_385_parts_diagram.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_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 5272 bytes
SHA-256: 12528181b7c5b09ad67e1a43af72ed8f20ab64096e872a7edbc807c94c5ee528
font_01_sfnt_off0000f456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 10820 bytes
SHA-256: 9d07824f4b77f8963ddb3a922f8d2eeb5a94ca3d756c05062173f2c1822c07b2

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