Malicious PDF — malware analysis report

Static analysis result for SHA-256 17357fbd8c8d7e02…

MALICIOUS

PDF

73.7 KB Created: 2021-03-14 14:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d98cf38862ecacc1fe23759a89fb32c9 SHA-1: 412255d8714b474d33e65f1c7c8c70dff5b89427 SHA-256: 17357fbd8c8d7e02237b1ab9218d699571f149fae69ad4e9d8f1fe258e30e7c0
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a social engineering attack designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=cpr+call+blocker+v202+manual
    • https://cdn-cms.f-static.net/uploads/4443578/normal_60337bf31a3ee.pdf
    • https://cdn-cms.f-static.net/uploads/4486201/normal_600d05abb4c16.pdf
    • http://rineset.xyz/2928675695933z4e.pdf
    • http://antonio-ita.space/elodea_cell_lab_answersa7l85.pdf
    • http://microdigitalmeter.xyz/how_do_you_know_if_your_airsoft_battery_is_chargedi0qda.pdf
    • http://nesobaka3.xyz/vapevafipumed39ro.pdf
    • http://mamuzomilap.iblogger.org/brother_printer_driver_mfc-_9340cdw.pdf
    • http://bit7.top/fawerojusenajufidujitose9al.pdf
    • http://sipujofavotad.iblogger.org/82506639317.pdf
    • https://static.s123-cdn-static.com/uploads/4365602/normal_5fed0378bf684.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kofibenem.rf.gd/how_to_remove_spark_plug_from_champion_generator.pdf
    • http://tuvalej.epizy.com/37560737376.pdf
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_9bd75d64fb6c4ba688d38e9efa0020fc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1f676683-582d-43cc-ba31-511ad61c1b0d/46560295299.pdf
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_9d1233f019a64dc8b38847c42b56c017.pdf?index=true
    • http://bosovuwid.epizy.com/how_to_wear_the_full_armour_of_god.pdf
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_16a3d01d35f14678b22e58d57688ecd4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4385eb6d-88df-4114-b871-9c35e53712fd/sixumoge.pdf
    • https://uploads.strikinglycdn.com/files/26afe993-7def-4b68-a5b7-41524b51a823/87217060391.pdf
    • http://zuvaxazalafes.epizy.com/67095952400.pdf
    • http://fupuvomevo.rf.gd/why_use_a_pedestal_sump_pump.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d37b.bin
c90121591476965ac609531b8b94bce99671ce7ebd06342f617583e76fa3c04f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD37B 5216 bytes
font_01_sfnt_off0000e51a.bin
8b03b88ea85b05fea99071a25ebc97c2f229747860d5cda3ed2459d5cd4e1d9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 11744 bytes
font_02_sfnt_off00010bc0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC0 4324 bytes

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