Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd590221984eeea…

MALICIOUS

PDF

78.6 KB Created: 2021-03-30 22:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abd706680680ffbf4cdeb1b9dae1d205 SHA-1: b3c6c727c83a9288e5e2b84fd1efebb3ced00a9b SHA-256: efd590221984eeea330969b9ee01c675765a9ed446570ae162d9ee9b76093efd
96 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 high risk score. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely used for phishing or to host a secondary payload. The document body is heavily obfuscated, but the presence of external URIs and the overall detection indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=into+the+labyrinth+pdf
    • https://cdn.sqhk.co/goberirud/GG9DjiC/talking_tom_gold_run_video_game.pdf
    • http://lyudi23.ru/guvuvukebarukibulw6rj.pdf
    • https://static.s123-cdn-static.com/uploads/4366308/normal_5fcc5a888b342.pdf
    • http://optalpha.com/little_chief_smoker_recipes_jerky6rlz7.pdf
    • http://dreamingdeveloper.com/best_android_phone_under_300_australia_2018q3nbk.pdf
    • http://visiblawty.com/java_basics_for_interviewyek9q.pdf
    • https://cdn-cms.f-static.net/uploads/4480893/normal_5fe894cb3e8fc.pdf
    • http://vquest.website/fikuxijowevufinuzasefilimklrp.pdf
    • https://cdn.sqhk.co/fixiwuwukufi/gihgBgh/80947914822.pdf
    • http://cashfree.store/46858367235pxgfg.pdf
    • https://cdn-cms.f-static.net/uploads/4379370/normal_60176617be595.pdf
    • https://cdn.sqhk.co/kanereneb/MhgjfLU/canvas_virtual_learning.pdf
    • http://donbetosstreettacos.com/the_age_of_reason_sartrel1bfc.pdf
    • https://cdn-cms.f-static.net/uploads/4417986/normal_60418dc7b240e.pdf
    • https://cdn.sqhk.co/lexujowina/J8jeogd/do_not_touch_willie.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_0a1ec040c9154258ac859b1274c034dc.pdf?index=true
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_dbb4e3fc00614c83b06830c2da6684ea.pdf?index=true
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_62f6ea4640624c41a19dcd61615e74d4.pdf?index=true
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_fb108be0acab42e3915f08fc86f73fd8.pdf?index=true
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_f6cfd4c4fb5e475aa17675eb07cfce29.pdf?index=true
    • 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_off0000eb86.bin
09a804c7106391e399a7e9039fb144de12003f74c7c1c22063bb92682076e7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 4916 bytes
font_01_sfnt_off0000fc26.bin
8afb7b3d39bb96f971a8004c74839b4c010e6e20b7b84e9002ef5feff58e38b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC26 10332 bytes
font_02_sfnt_off00011f86.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F86 4324 bytes

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