Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92716cd77a0a7df…

MALICIOUS

PDF

66.8 KB Created: 2021-04-06 09:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78203564eec799385d9e54475716606d SHA-1: 6817bc817bb90c41ff80035758c54268422890a7 SHA-256: b92716cd77a0a7dfc33d088c52ddc0adb6d3ffa9f46ac12751985c310a85802c
94 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically one pointing to 'kuzutuzo.ru', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8424

Heuristics 3

  • 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
  • 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://kuzutuzo.ru/award?keyword=asco+joucomatic+catalog+pdf
    • https://cdn.sqhk.co/gogefaman/eKGriXb/how_to_draw_so_cute_ice_cream.pdf
    • https://cdn.sqhk.co/kemivabesu/juuWjb1/rivaturutufolokew.pdf
    • http://wobomekisad.22web.org/86656012569.pdf
    • https://cdn-cms.f-static.net/uploads/4460076/normal_6022da9dda3d9.pdf
    • https://cdn.sqhk.co/makekajet/jfghoTQ/42122322418.pdf
    • https://cdn.sqhk.co/mejomusajob/he7hicc/muzafovutemonijovepib.pdf
    • https://cdn-cms.f-static.net/uploads/4368494/normal_6030dc86c7944.pdf
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/gaviximusow.pdf
    • https://rikumuxazomibib.weebly.com/uploads/1/3/6/0/136082685/lubifuwifi-nisodubem-dufinasixotu.pdf
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5fdb33c2a4a50.pdf
    • https://cdn.sqhk.co/kurotevu/eiajbhd/80440938922.pdf
    • http://jaziroluren.iblogger.org/momijezixelexokakuk.pdf
    • https://cdn-cms.f-static.net/uploads/4447273/normal_6069fc3b50762.pdf
    • https://static.s123-cdn-static.com/uploads/4449768/normal_5fee2a46909c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_b146cca4b4484d52bae5a98b852cc50a.pdf?index=true
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_6928f005b72c4706a7ef9afced5017cb.pdf?index=true
    • http://babematalal.epizy.com/mifoxodejab.pdf
    • http://pikotesewelum.epizy.com/backpacking_merit_badge_pamphlet.pdf
    • http://nuvebuxuloruvux.epizy.com/car_wash_fundraiser_flyer_template.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba2.bin
fe9376815ee36d4b12aeb5ef9fb1909da9c801f399ef3b81a5c3483cf4ac462b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA2 5100 bytes
font_01_sfnt_off0000dd09.bin
ba695d72b5372268a295faf296ad5b0800ad0c9f267959435292b71ad5c69381		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 15636 bytes

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