Malicious PDF — malware analysis report

Static analysis result for SHA-256 889bc6c7bfdb7deb…

MALICIOUS

PDF

93.5 KB Created: 2020-11-11 00:34:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3badd59bf3f1e9de562d8d0ff13f4f98 SHA-1: d7df18e7e90b126c4b1517c27208b11693691ff1 SHA-256: 889bc6c7bfdb7deb6f7fc100c2cf57fd47e044fd46cafd8fd88b33461bdf42be
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 high likelihood of malicious intent. An external URI pointing to 'traffnew.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded URI are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?keyword=mta+bus+fleet+cptdb
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f8afad7d0521.pdf
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5f930cbe1c084.pdf
    • https://cdn-cms.f-static.net/uploads/4412996/normal_5f9a442284e68.pdf
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5fa0321f09563.pdf
    • https://cdn-cms.f-static.net/uploads/4407087/normal_5f987f343ecdd.pdf
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5f8e34d81cf1c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://s3.amazonaws.com/gupuso/mmoire_architecture_bioclimatique.pdf
    • https://s3.amazonaws.com/bededuxotulapil/napoleon_bonaparte_alan_schom.pdf
    • https://uploads.strikinglycdn.com/files/d161dc4c-c3d3-449c-a2f7-a12dde261f5b/duzisopunafemal.pdf
    • https://uploads.strikinglycdn.com/files/22cb34bc-18c0-4bce-b47b-318383e47ec8/kuxoxowa.pdf
    • https://uploads.strikinglycdn.com/files/01e42c08-6e89-4b46-80d6-b5168f5f6b2a/parking_fury_unblocked_2.pdf
    • https://s3.amazonaws.com/zolerazowubow/17008872623.pdf
    • https://s3.amazonaws.com/liwafo/fangtooth_fish_adaptations.pdf
    • https://s3.amazonaws.com/xipavir/chargeback_retrieval_request_procedure.pdf
    • https://uploads.strikinglycdn.com/files/779c25fe-1498-464e-a0af-c6eba276e701/discount_dance_supply_locations.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000136b7.bin
8524d96bf03cddfd487fee81ad4ec8cc86eb61d559a32535deced0009a85769f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x136B7 28256 bytes
font_00_sfnt_off0000f04e.bin
8a473ab9c07b1f22dfcd8e0a109b81a550ae60670bffad9af777fe65f9364feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 5200 bytes
font_01_sfnt_off00010210.bin
be38186c9256ba0e64b07d34cca2e63b176d3ffd182ae4667a642b503e748fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 6148 bytes
font_02_sfnt_off000111f0.bin
e427884949dcc51a07aa6f676daeb3f730c5289b7fc9725e47a7934acff6ccf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 10776 bytes

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