Malicious PDF — malware analysis report

Static analysis result for SHA-256 0deef9de35f4573f…

MALICIOUS

PDF

78.1 KB Created: 2021-04-29 20:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32591d0cf5a22651316700c09ddb6ac2 SHA-1: bbb371bdc4a1400837d4b2dbb8ab1bb865e8e612 SHA-256: 0deef9de35f4573f8a0535a7bb7ca68c673bd890ab2db28b9f7f14a66eb3e778
96 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 PDF contains an embedded URL pointing to 'kuzutuzo.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users through social engineering, fitting the pattern of a phishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=the+night+before+christmas+story+read+aloud
    • http://sutiboju.sportsontheweb.net/tuwefukagapapatujirefow.pdf
    • https://cdn.sqhk.co/rapawaferew/Nibhgy3/28283132240.pdf
    • https://cdn-cms.f-static.net/uploads/4484097/normal_605f96e342b33.pdf
    • https://cdn.sqhk.co/marezotije/cii5jje/dipakobesaluto.pdf
    • https://cdn.sqhk.co/lepavenujal/igwntJe/73186494597.pdf
    • https://cdn.sqhk.co/xasexuwosul/ZmicWFI/baginononagovaluzojen.pdf
    • http://mojoliziriba.22web.org/34294725331.pdf
    • http://zekaxezixil.medianewsonline.com/37079084709.pdf
    • https://cdn-cms.f-static.net/uploads/4497109/normal_60362581acf72.pdf
    • http://lexaxak.mywebcommunity.org/brain_food_for_studying.pdf
    • https://cdn.sqhk.co/libobivole/CNhbaVS/learn_to_play_piano_piano_online_course.pdf
    • https://cdn.sqhk.co/pazaxefuma/agjQDeT/british_basketball_league_minimum_salary.pdf
    • https://cdn-cms.f-static.net/uploads/4481408/normal_6010c6cdefa4a.pdf
    • http://kuzexamipapoxip.medianewsonline.com/acceptance_prayer_aa.pdf
    • https://cdn.sqhk.co/borefigux/hjjfxje/90080384513.pdf
    • https://cdn-cms.f-static.net/uploads/4448337/normal_602170fa25562.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nimitijas.rf.gd/89532206195.pdf
    • https://uploads.strikinglycdn.com/files/08eee441-a3e3-4b26-be79-7d243a516fdf/68873325956.pdf
    • http://jigiwema.epizy.com/16559964382.pdf
    • https://uploads.strikinglycdn.com/files/aa5cd2dd-e4c1-4788-af98-91eabebc7cee/faratuxa.pdf
    • http://liwiwixorajedik.rf.gd/diduxumovamodomopakazo.pdf
    • http://bezepegu.epizy.com/kapakezus.pdf
    • https://uploads.strikinglycdn.com/files/df3bef2a-3ab0-4a3c-8ccd-8842b9f43ded/molecular_and_cellular_biology_textbook.pdf
    • https://uploads.strikinglycdn.com/files/0e568f05-fe78-49da-82d4-e4ef2cac86d7/vimutasisujarep.pdf
    • https://uploads.strikinglycdn.com/files/f61c8452-a6fe-4a83-9db6-ae8ebe2cebac/babibiloso.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_off0000efb4.bin
4468fb7bbb6ad6774e010a2c8767a9ca73d651a4fdbf04d594b366103f0737eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 5628 bytes
font_01_sfnt_off000102b5.bin
0c9992719238468bb9550136fad813d5c66ac3d4787d3664078e3d743caa1489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 11096 bytes

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