Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fff08b5d0ee11be…

MALICIOUS

PDF

76.4 KB Created: 2020-12-28 01:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a551e57f41958b8a984c35c51cc1276a SHA-1: 180b85a97c5e3981267c6cf86de29c8095e15361 SHA-256: 6fff08b5d0ee11bed8ab3e84c31de6213d9907b62ee1927b58164f0076c3abdd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, `https://cctraff.ru/strik?utm_term=what+happened+to+my+verizon+cloud+pictures`, which is indicative of a phishing or credential harvesting attempt. The document body, though heavily obfuscated, suggests a lure related to Verizon cloud pictures, aligning with the 'SE_PAYMENT_REDIRECT_LURE' heuristic. The ML classifier and ClamAV detection further support the malicious nature of this file, likely serving as a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://cctraff.ru/strik?utm_term=what+happened+to+my+verizon+cloud+pictures
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f989f5d3baea.pdf
    • https://static.s123-cdn-static.com/uploads/4408862/normal_5fe34bc27116e.pdf
    • https://static.s123-cdn-static.com/uploads/4492915/normal_5fc531ee7b3e5.pdf
    • https://cdn.sqhk.co/wemofisejaf/sigsZhj/coaching_center_mobile_and_backend_app_nulled.pdf
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f9cd656c14e5.pdf
    • https://cdn.sqhk.co/naforokafe/eqmSijU/vujedafal.pdf
    • https://vuzitiruf.weebly.com/uploads/1/3/2/8/132814505/pimujazawiwi-ruxizulepajit-xolufiganejero.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kofabube/hormone_cascade_pathway.pdf
    • https://uploads.strikinglycdn.com/files/a55ad38b-ca58-4c2c-be63-c9e233438608/animal_farm_questions_and_answers_chapter_1.pdf
    • https://uploads.strikinglycdn.com/files/dc06827f-915b-4322-9fc0-0786ba3896ac/1432835816.pdf
    • https://uploads.strikinglycdn.com/files/5c98c11a-ba51-42f0-80ba-56c6e6c3455e/chemquest_33_intermolecular_forces_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/12420335-ab14-432c-9d88-1eee1becef6a/pogakuvukerogeguxesike.pdf
    • https://s3.amazonaws.com/vinejivunitego/nerugudizerirek.pdf
    • https://uploads.strikinglycdn.com/files/261792b0-1549-42c8-b409-d5af0e1ce4b9/40029118654.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_off0000ea97.bin
c2dbd50f5bcc4ec7e1938a64bf71d6472383a852acf709a26949cd685f413ceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 5540 bytes
font_01_sfnt_off0000fd5e.bin
c21d12c879a6db047f930ef367e1596ab111bf3797cc7820b5e0cdcf0a0bb359		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 10972 bytes

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