Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa1627dfee5e142…

MALICIOUS

PDF

60.0 KB Created: 2020-11-21 22:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebefd6e40bd543999003957df95ba3be SHA-1: 6acbd852d2240c3488af3cafdec42b4c322fcec4 SHA-256: daa1627dfee5e1427e663e78454e0a4aa6d2ac3e253831ef575b4a4af616e4cb
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of an external URI strongly suggests a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=kopachuck+middle+school+gig+harbor
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f8a5ab910e89.pdf
    • https://cdn-cms.f-static.net/uploads/4481662/normal_5fb2b2256126a.pdf
    • https://cdn-cms.f-static.net/uploads/4385424/normal_5fb95740e0622.pdf
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5fb5b16560f27.pdf
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5fb9723060ac0.pdf
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f9ad2be6cb1d.pdf
    • https://cdn-cms.f-static.net/uploads/4455196/normal_5fb2fdbd416a6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wanasuvedigo/14680073092.pdf
    • https://s3.amazonaws.com/jifesu/nikexuku.pdf
    • https://s3.amazonaws.com/baxunaf/ark_exceptional_kibble_gfi.pdf
    • https://s3.amazonaws.com/sivafasiniwe/98941789461.pdf
    • https://s3.amazonaws.com/jenisozazewubo/panera_bakery_menu_prices.pdf
    • https://uploads.strikinglycdn.com/files/d569ed6d-0f6c-4519-ae0d-0802df646234/kakovovin.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae50.bin
8579acc3407e472d1e554de0158ee1b09b729ab98a6925dde661fd85306e6e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE50 5660 bytes
font_01_sfnt_off0000c159.bin
9f536fd0f94e537e74863bba5772bbfb4f64b2ff8853fdc9bda987de010d79ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC159 10136 bytes

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