Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a204d7fe26c7529…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 13:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3d7cc46206ec9f56e2f742907aa444c SHA-1: 193c87e657a45444053077a1a64403d0c7366151 SHA-256: 3a204d7fe26c7529ef9dd24146735fa3a36205c6b2c9c732c29f7432f3311590
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, disguised as a PDF document related to bioenergetics MCQs. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=bioenergetics+mcqs+pdf
    • http://cmb-eco.com/nantucket_lobster_trap_phoenix092i9.pdf
    • https://cdn.sqhk.co/padirazemi/idOhccq/business_email_writing_exercises.pdf
    • https://cdn.sqhk.co/vozeseseber/hjfgfge/pacsun_careers_near_me.pdf
    • http://brumbum6.xyz/xevubawojuimyx.pdf
    • http://studyweb.site/96701220201hqs62.pdf
    • http://prodive.su/56965254668l2dry.pdf
    • https://cdn.sqhk.co/miseseren/gegexii/livezobugexagavomaxo.pdf
    • http://love-your-lips.online/redenitegopekimplo3e.pdf
    • https://cdn.sqhk.co/rodoruwuwab/gjjcLha/98626435838.pdf
    • https://cdn.sqhk.co/zusisoko/iefiajd/b._ed_online_form_2019_punjab.pdf
    • http://trackengine.host/vobafep38err.pdf
    • https://cdn.sqhk.co/zivuzigup/12DaPyB/vejamisituma.pdf
    • http://theplafond.xyz/cake_recipes_free4ihnk.pdf
    • https://cdn.sqhk.co/kerosumumato/ieyqhhg/sobabosewigotuji.pdf
    • http://creditscorefix.info/pivisapijerateroxuwoipc1r.pdf
    • http://legendnat.space/pomiwagarakada2oqgm.pdf
    • https://cdn.sqhk.co/jinubodilev/phj4gdM/monkey_go_happy_ninjas_3_walkthrough.pdf
    • https://cdn.sqhk.co/xovenekot/idPplhb/34147460455.pdf
    • https://cdn.sqhk.co/gatavikap/4uwigij/bugateluju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8dd27067-5dad-475f-b908-d8a177f497f0/how_to_say_i_love_your_art_in_japanese.pdf
    • http://mizujem.epizy.com/utd_mechanical_engineering_degree_plan_2018.pdf
    • https://uploads.strikinglycdn.com/files/2eda74a5-41e8-4bba-ba9a-35e96af28357/graco_stroller_frame_chicco_keyfit_30.pdf
    • http://firelilox.rf.gd/que_es_el_liderazgo_segun_autores.pdf
    • http://girigiroret.rf.gd/fefog.pdf
    • https://uploads.strikinglycdn.com/files/780fdc59-f3fd-4735-8ed3-409dd8e8c871/78763096484.pdf
    • http://balepififeri.rf.gd/adventure_capitalist_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/78582bb7-83e3-4bda-a3f0-8cea590318e5/natitisatupopo.pdf
    • http://pifowatasaputi.epizy.com/wewekanumedumovazi.pdf
    • https://uploads.strikinglycdn.com/files/efc1a2dc-a8c2-4a35-bf78-5ffb30d88edd/fasiniforud.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_off0000ed1a.bin
43bc1e976910a790242b71de5f649f3a070610eb7c53037dfc23ad14f54c605d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 5408 bytes
font_01_sfnt_off0000ff6d.bin
2956fa83f61f37518a0b3595fb68a90aa03aca14998ff32fd25ea18cb83e82ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 11788 bytes

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