Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ec7e4bb14ffa3b…

MALICIOUS

PDF

90.3 KB Created: 2020-11-10 06:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a22c47be0cda7dec69620527efa2399 SHA-1: 154db329a891f1ab714fa82d3db5494e31d4739a SHA-256: 26ec7e4bb14ffa3b589bb27bc3ba11983de6faf1530afe217b7aadfff50ae538
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a keyword search, suggesting a lure to a malicious website.

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://traffnew.ru/123?keyword=hand+of+the+mage+pathfinder+2e
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f959d89513d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lorifumofelu/xalegefonifuxenimag.pdf
    • https://uploads.strikinglycdn.com/files/d3c5a0da-8b4e-4377-9b2d-c9136c0596ef/nocturne_in_e_flat_major_information.pdf
    • https://uploads.strikinglycdn.com/files/7f9cfe18-939e-40cb-9c20-d0389def417b/zoxizow.pdf
    • https://uploads.strikinglycdn.com/files/6017ff24-5403-4050-9ac9-3d23dd6fce5a/86921275124.pdf
    • https://uploads.strikinglycdn.com/files/be29c7bf-b689-46f1-ae11-9307d893f178/74784561111.pdf
    • https://uploads.strikinglycdn.com/files/09b47d86-fd08-49ab-9bf3-d37dcacd0429/73238251675.pdf
    • https://uploads.strikinglycdn.com/files/c1e97e4b-e2e4-4dcd-872b-cee988cc3888/45494912223.pdf
    • https://s3.amazonaws.com/tadovu/business_school_book_in_telugu_free_download.pdf
    • https://s3.amazonaws.com/henghuili-files/nsfas_online_application_form_2019.pdf
    • https://uploads.strikinglycdn.com/files/99417b2e-cdeb-47db-a114-0608d5428afd/lokiwobedofonamil.pdf
    • https://s3.amazonaws.com/jusuberu/mowusokusinuk.pdf
    • https://s3.amazonaws.com/xakapudakadu/gibeje.pdf
    • https://s3.amazonaws.com/sivanira/manual_operador_industrial_de_calderas.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_off00012701.bin
ee3ace309eb3448a658ba382512610ac96f1dc10c882079b7d9c0e725392a65b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12701 5336 bytes
font_01_sfnt_off00013901.bin
8f66ec4c48e5c443a934b185bc9d91c3afadb2f6e8427fc091e2bed97737d4b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13901 10260 bytes

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