Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f09e1b67c69efcb…

MALICIOUS

PDF

80.0 KB Created: 2021-06-09 13:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0de10f15e25db4b031e77cd0465d840b SHA-1: 9800a14bdece00daac3ad89c686d5595e8f3e7c4 SHA-256: 5f09e1b67c69efcbfd576668c629c290352d711763f2d59b74c57b0c2c60d78d
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'huntic.ru' was extracted, suggesting a potential phishing or malware distribution attempt. The presence of PDF-specific heuristics and embedded artifacts indicates a crafted PDF document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/pbw?utm_term=kick+the+buddy+hack+online
    • https://static.s123-cdn-static.com/uploads/4407804/normal_5ffaa83db9b25.pdf
    • https://static.s123-cdn-static.com/uploads/4476580/normal_600037bdac764.pdf
    • https://static.s123-cdn-static.com/uploads/4375886/normal_5ff14d0469576.pdf
    • https://cdn-cms.f-static.net/uploads/4408702/normal_603fda917380e.pdf
    • https://cdn-cms.f-static.net/uploads/4450356/normal_5fd6aad9b334c.pdf
    • https://cdn-cms.f-static.net/uploads/4496151/normal_60678460835ac.pdf
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5fe5037044e64.pdf
    • https://static.s123-cdn-static.com/uploads/4374022/normal_5ff283ccaaa1f.pdf
    • https://cdn-cms.f-static.net/uploads/4467564/normal_606ccb2f8b10b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/909c8b7a-9b6c-4d34-be3e-bca6ab864152/30813137949.pdf
    • https://uploads.strikinglycdn.com/files/69e14414-36e9-4de2-9f36-127cd9d3b059/star_wars_books_for_kids.pdf
    • https://uploads.strikinglycdn.com/files/f80c5ca8-4308-4cdc-8af3-6436877fb161/2330775522.pdf
    • https://uploads.strikinglycdn.com/files/7f57eee6-8e47-4489-b7a2-4ac02d9cfe88/pofitovupuw.pdf
    • https://uploads.strikinglycdn.com/files/8f358192-c212-473e-a62f-dabd852a8676/radio_shack_police_scanner_repair.pdf
    • https://uploads.strikinglycdn.com/files/f23d0fd2-1126-4700-86a9-f8a7140b5621/putewojar.pdf
    • http://molujox.pbworks.com/f/80437060324.pdf
    • http://dajodovilav.pbworks.com/f/51787520943.pdf
    • http://lipemuv.pbworks.com/f/commonlit_the_bet_text_dependent_questions_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/51f653a1-628e-4e13-9699-4be4da2f2bd1/buxoretogutezotobudikixox.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e759.bin
77fa8ff42667060c65e9fcb1ccffb2a1a8e07dcc0ff481dfc275d57bf722df95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 5028 bytes
font_01_sfnt_off0000f87c.bin
08b147f362163dea3a8017c25bfab9bf03546e8cf936ead8c2135454059a5c4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 10852 bytes
font_02_sfnt_off00011dbb.bin
7f85b26e62eba69146dc7438ff276137e072823ff9fd45ab382834de6c431daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBB 16080 bytes

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