Malicious PDF — malware analysis report

Static analysis result for SHA-256 7925b83d6a84be44…

MALICIOUS

PDF

73.6 KB Created: 2021-03-28 09:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2813e0b8cbe5e368b13352ba3370fe24 SHA-1: dbe753a1137ff97d1fa5d5d3aeee1799b68bebb8 SHA-256: 7925b83d6a84be4463c0aed48c0b604d604cebaaadef09d13301f1f591720619
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 presence of external URIs and embedded URLs suggests the document is designed to redirect users to malicious sites or download further payloads. The document body, though heavily obfuscated, contains text related to 'Embryology pdf free download', likely a lure to entice users to click on the embedded malicious links.

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://ponafet.ru/award?keyword=embryology+pdf+free+download
    • https://cdn.sqhk.co/senuziker/gaKjMgg/speed_motorcycles_for_sale_near_me_used.pdf
    • http://dowuwomili.iblogger.org/50712497369.pdf
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fd30623d491e.pdf
    • https://cdn.sqhk.co/tipefima/gmjiu4h/75067987338.pdf
    • https://cdn.sqhk.co/fogunedevare/gH0hhxL/pink_floyd_ringtones_free.pdf
    • http://mitefakosutupot.22web.org/email_format_sample.pdf
    • https://cdn.sqhk.co/jimavidozeze/jhgBaJ8/old_national_bank_east_towne_madison_wi.pdf
    • https://cdn.sqhk.co/nimotixalulo/hijiaqY/realistic_space_pictures.pdf
    • https://cdn-cms.f-static.net/uploads/4471988/normal_5fe6ea023c3b8.pdf
    • http://gijaziveved.iblogger.org/94886389733.pdf
    • https://cdn.sqhk.co/fumodolanes/jbgjLRH/dikam.pdf
    • http://dukepiweg.iblogger.org/the_moon_of_the_caribbees.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rofokosakesa.epizy.com/67983107155.pdf
    • http://sikovisata.rf.gd/73931656824.pdf
    • http://vemixizafij.rf.gd/60688246433.pdf
    • http://pinamagowejut.epizy.com/pokemon_legends_new_quest_guide.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_off0000e0ea.bin
d9b90d8c9db4b7da7b06410bd1772a1b5f05fc62af8268e32d9c8732180c3d62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 5472 bytes
font_01_sfnt_off0000f38a.bin
a019654891a33573006b2f473d4689fb85c7c274dad3195678db9e748a1921b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF38A 11284 bytes

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