Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4a79daa7fc35ab…

MALICIOUS

PDF

68.2 KB Created: 2021-03-11 11:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a60ef5ebae2160bbeedf94fad1c425 SHA-1: 29b41ea7748d751cdafc33933b66ebd3cd80e16c SHA-256: cb4a79daa7fc35ab16131e8582f5d0720ddfb3d2c440df5be8b34699463a0e93
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI in the document body implies an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=sample+course+description+template
    • http://onatural.space/96496245321scxlb.pdf
    • https://cdn-cms.f-static.net/uploads/4384048/normal_603fdbec4a672.pdf
    • https://cdn.sqhk.co/dafisuwikib/cicYbvU/monster_hunter_switch_review.pdf
    • https://cdn.sqhk.co/fukonovum/tjag3Fh/oconomowoc_library_cafe.pdf
    • https://static.s123-cdn-static.com/uploads/4488842/normal_5fc603b2b0994.pdf
    • https://cdn.sqhk.co/mekurapiw/ba8gfhh/baweregurini.pdf
    • http://all-system7.club/66087893877ne8nb.pdf
    • https://cdn.sqhk.co/fonizijodi/fDCHZCd/wepopakibarojuju.pdf
    • https://cdn-cms.f-static.net/uploads/4445118/normal_600d0fb938f88.pdf
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5fe882ad97010.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a4c8e349-b3ea-47e2-8652-b685a0c17b84/57815822251.pdf
    • https://uploads.strikinglycdn.com/files/1a155ebd-0df4-4b96-9b52-542e286bb3ee/gif_bill_and_ted.pdf
    • https://uploads.strikinglycdn.com/files/81c3ff83-97c4-4e2b-b388-d31e876e61cf/22370117105.pdf
    • http://lutaxipokujopej.epizy.com/calendario_lunar_2018_gratis.pdf
    • https://uploads.strikinglycdn.com/files/3ae82265-c2df-4c06-a77b-19e0fbe5dde4/twilight_2008_full_movie_in_hindi_dubbed_download_filmyzilla.pdf
    • https://uploads.strikinglycdn.com/files/944d7730-e610-476f-ba19-cbd68f3bc24a/13246795994.pdf
    • http://fojofediwesifog.rf.gd/who_is_john_maxwell_author.pdf
    • https://uploads.strikinglycdn.com/files/e0ceac08-8425-4192-9183-71845163503c/tozinefedu.pdf
    • https://uploads.strikinglycdn.com/files/7f50c1dc-6a63-40db-9afc-966d81a126ff/giruv.pdf
    • http://xumidexasij.epizy.com/bunnings_fire_proof_sheeting.pdf
    • https://uploads.strikinglycdn.com/files/8409e833-57f7-45f7-8c4a-bfb6dc1621f9/50530974029.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_off0000d0b8.bin
c90e1036f19fc24bce03b95250ed55ab00a0042ad8f79fd6fc8b7b5de88ca4ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 5324 bytes
font_01_sfnt_off0000e2b1.bin
24f0c3f7a48bb5d1392e48cd4adcede09d3f812493bc1759118ba5777612adfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 9568 bytes

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