Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4b599818d56ff2…

MALICIOUS

PDF

77.3 KB Created: 2021-05-19 09:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223149904973f35a93fb4f8acde954f2 SHA-1: e6c2b4563d8ed377a5638c47e792c380de81fcce SHA-256: cb4b599818d56ff2d7980dda6960cd7f122046b7460778d78cd88642d3db8656
96 Risk Score

Malware Insights

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

The PDF contains a URL disguised as a download link for a game crack, which is a common social engineering tactic. The embedded URL points to a suspicious domain, and the file was flagged by multiple detection engines, including ClamAV and a machine learning classifier, indicating malicious intent. The PDF structure itself also contained anomalies, suggesting it was intentionally crafted for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=call+of+duty+black+ops+2+multiplayer+online+crack
    • https://cdn-cms.f-static.net/uploads/4392661/normal_606d178408180.pdf
    • https://cdn-cms.f-static.net/uploads/4365636/normal_601b00f10d312.pdf
    • https://cdn-cms.f-static.net/uploads/4453550/normal_6035ba6f37713.pdf
    • https://cdn-cms.f-static.net/uploads/4489245/normal_5fd147558d832.pdf
    • https://cdn-cms.f-static.net/uploads/4368975/normal_603e1a514acaf.pdf
    • https://static.s123-cdn-static.com/uploads/4420037/normal_5ff22d62552f9.pdf
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5fca6d3a53e8a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/petubapizo/93255738319.pdf
    • https://uploads.strikinglycdn.com/files/e113ec77-c76f-4dc1-a81e-f48be3cbc38c/how_to_change_tail_light_on_polaris_ranger.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/nomuvabixejomuposazuj.pdf
    • https://uploads.strikinglycdn.com/files/772b9187-651d-4504-8377-5c594f966e5d/sifuridoru.pdf
    • https://uploads.strikinglycdn.com/files/601f17c1-0e73-451a-aac6-ab2c0d59959e/how_to_change_belt_on_kenmore_dryer_80_series.pdf
    • https://uploads.strikinglycdn.com/files/17889c16-224e-4723-8923-7901f5391d30/toweno.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/lajov.pdf
    • https://s3.amazonaws.com/lupuvogotog/jasepanotake.pdf
    • http://wukofufo.rf.gd/xipopibipopimazikasodemad.pdf
    • https://uploads.strikinglycdn.com/files/af3df34b-3851-40fc-bd65-1b78d1e8708f/93625156838.pdf
    • https://uploads.strikinglycdn.com/files/0b6cfe56-1d6d-46c9-a4a7-bd2f8556273e/nopiditomabumar.pdf
    • https://uploads.strikinglycdn.com/files/d058fd1f-9573-4069-ab01-3c777d31660d/14273651719.pdf
    • https://uploads.strikinglycdn.com/files/a3a94ae9-f5b7-4514-8234-e4f713400e5f/ariel_steam_shower_owners_manual.pdf
    • http://tubaduk.epizy.com/78667180539.pdf
    • https://s3.amazonaws.com/gomakobez/salvatore_ferragamo_mens_shoes_size_guide.pdf
    • https://uploads.strikinglycdn.com/files/f601257e-1f54-48be-b57f-bc45094802c1/agilent_33220a_matlab_driver.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_off0000ee56.bin
dcc469770754a7856f1192287a59ff27f216844f610b4b9647aa7b0b38d345d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 5644 bytes
font_01_sfnt_off0001017a.bin
49f312a804d611fc3ddc69dc2fe3791b59355b0f1ec863a4638f1843ac639ddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 11504 bytes

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