Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe0bf89d2ac3a53…

MALICIOUS

PDF

79.3 KB Created: 2021-03-29 04:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 500c962b264ce10fb0db531b491c1b46 SHA-1: 76dc6b280e108f1ea13073306f6bf93a8ebc70a3 SHA-256: cbe0bf89d2ac3a53baad0937d84e3cd900f3d58e106bbeb8750712299aee8f5e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URL, 'https://kuzutuzo.ru/wix?keyword=roblox+robux+codes+free', suggests a lure to trick users into visiting a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=roblox+robux+codes+free
    • http://giocodigital.space/63225202090666c5.pdf
    • http://vovpomnim.ru/b_pharmacy_syllabus_2nd_year_201818p9k.pdf
    • http://devlp.club/boy_scout_handbook_12th_editions7wi9.pdf
    • http://betmoy57.com/63464615329nnsb4.pdf
    • http://sberpodarok2020.online/migiwalojexekuraci671.pdf
    • http://agent-ritual495.online/line_plot_lesson_5th_graderjtdb.pdf
    • https://cdn-cms.f-static.net/uploads/4471253/normal_601f223b7dc57.pdf
    • http://newyearshop.site/why_is_my_brother_printer_offline_windows_8wjzuc.pdf
    • http://cashthe.ru/how_to_sync_skullcandy_headphones_to_iphonem2in6.pdf
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5ffcd6a7266d9.pdf
    • https://cdn.sqhk.co/jadizefon/bbRcNr6/78591755792.pdf
    • http://zhigina.ru/gerenikapedetoketaxnrj5.pdf
    • http://storeeuro.info/what_cards_are_issued_by_metabank0oah2.pdf
    • https://cdn-cms.f-static.net/uploads/4417834/normal_60260cfef37da.pdf
    • https://cdn.sqhk.co/gukugifixija/Zcjb8WH/beat_the_puppet_hack_download.pdf
    • http://gbarb.me/la_la_la_bbno_piano_sheet_musicd4kpo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_fb9d05b5f4b640788a3a8102cac73b96.pdf?index=true
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_2d6aefaca75a448eb56f20134552ceb2.pdf?index=true
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_8718b4c75d1047b1af8d130d95196b08.pdf?index=true
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_256dceb5ae694aeeb14aef10e8204216.pdf?index=true
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_d8ce0d10c4af4f9992cddbe17b70623d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b2.bin
6c4a804c8fa4399c68d76bbad7c28b03f0d443d08e860d2346237bd280d363eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B2 5020 bytes
font_01_sfnt_off000108e0.bin
9f8c600a4c0e8822a00fc71dc0bd374c1e8526e6cd9f4a588208194f04b75464
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 11564 bytes