Malicious PDF — malware analysis report

Static analysis result for SHA-256 7369c46c82c14a51…

MALICIOUS

PDF

79.6 KB Created: 2021-04-19 03:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 968d7ee415e574d81152cb9563eca55a SHA-1: 71fd1dbc622e17feba9a434118c933a523fc3043 SHA-256: 7369c46c82c14a51a01499cb14a06d2ead4b1cff443f6e8977f0fdaa4b57ab1f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to a song title, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/strik?utm_term=how+high+is+stairway+to+heaven
    • https://static.s123-cdn-static.com/uploads/4447465/normal_5ff91a1e6780a.pdf
    • https://cdn-cms.f-static.net/uploads/4424009/normal_605dd8b341330.pdf
    • https://static.s123-cdn-static.com/uploads/4455403/normal_6000678a3218c.pdf
    • https://cdn-cms.f-static.net/uploads/4528260/normal_605f941b74c93.pdf
    • https://cdn-cms.f-static.net/uploads/4376856/normal_601aba3917397.pdf
    • https://cdn-cms.f-static.net/uploads/4482623/normal_60436dd9b618a.pdf
    • https://static.s123-cdn-static.com/uploads/4375077/normal_6005bf0ec97c3.pdf
    • https://static.s123-cdn-static.com/uploads/4386094/normal_6003417173385.pdf
    • http://wavewozokuxa.getenjoyment.net/62397949138.pdf
    • https://static.s123-cdn-static.com/uploads/4373769/normal_5fe40585cbd8c.pdf
    • https://static.s123-cdn-static.com/uploads/4449424/normal_5ff658d8d5148.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/da43c217-499d-472f-b1a0-689e04dfd188/subtraction_across_zeros_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/a1722e74-d36e-4560-97bd-bc9c8029fcb8/vunalobetajog.pdf
    • https://uploads.strikinglycdn.com/files/36bece30-a20f-4cc6-87b2-0153b8f18e49/sezileje.pdf
    • https://s3.amazonaws.com/rizezobabub/59148751772.pdf
    • https://uploads.strikinglycdn.com/files/53d1f520-6fa6-4c55-8459-8c94f3d1c7c1/smoothie_recipes_easy_healthy.pdf
    • https://uploads.strikinglycdn.com/files/bc49bf77-35ad-41ec-8dc9-b5d79b4b0aab/zepelipavilida.pdf
    • https://uploads.strikinglycdn.com/files/421828fd-136c-4ae2-a4c2-d9f034375f19/7039657793.pdf
    • https://s3.amazonaws.com/sixolose/how_many_hatchet_books_are_there.pdf
    • http://tosurok.myartsonline.com/how_to_turn_on_a_samsung_syncmaster_p2570hd.pdf
    • https://uploads.strikinglycdn.com/files/777f1c47-79ca-4910-95f7-efe7f244819d/check_your_understanding_answers_math.pdf
    • http://rawegutidum.onlinewebshop.net/composite_material_file_download.pdf
    • https://s3.amazonaws.com/jezobasit/how_to_use_your_own_domain_name_with_wix.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_off0000f594.bin
d18817066626148dba48998eebaf2d8cca526f8cf18b54ecfea485eeb339e5c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 5132 bytes
font_01_sfnt_off00010721.bin
0d2c58704a93e3b7fc2204255f4412069095a9a1b1ec826e4ce13977162a277e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 11708 bytes

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