Malicious PDF — malware analysis report

Static analysis result for SHA-256 5298c8e11dd783ee…

MALICIOUS

PDF

114.6 KB Created: 2021-03-23 18:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d26c012a1316afdbd6761a5bf41d92b SHA-1: dcdc9e03013fa014f451f0a9ccb27564d9e2904e SHA-256: 5298c8e11dd783ee7bf1dbb62230d35825c27eda2ea5acb8e0bf019167a29cae
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, 'leonvi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to medical treatment, aiming to trick users into clicking the malicious link.

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://leonvi.ru/award?keyword=otite+moyenne+aigue+traitement+pdf
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdf
    • http://suzofovolavuk.scienceontheweb.net/circle_area_questions.pdf
    • http://pedefep.22web.org/15312371436.pdf
    • http://lozuzaragujeb.mypressonline.com/irrigation_engineering_by_rk_sharma_free_download.pdf
    • http://faripofijukevom.mywebcommunity.org/stories_of_your_life_and_others_understand_summary.pdf
    • http://rajenajodaf.iblogger.org/31481739600.pdf
    • http://xovitixekewelom.scienceontheweb.net/fapevo.pdf
    • https://cdn.sqhk.co/winexumalov/j5kYJzu/2810324723.pdf
    • http://fibakigefejep.66ghz.com/curriculum_definition_in_education.pdf
    • https://cdn.sqhk.co/givesaxi/mEQUBgg/78830126919.pdf
    • http://kexipisibufexur.22web.org/68449921589.pdf
    • http://luzibis.iblogger.org/98951902454.pdf
    • https://cdn.sqhk.co/wixedineve/2ZqTigF/gta_vice_city_game_cheat_keyboard.pdf
    • http://kerutugizuxig.mygamesonline.org/encyclopedic_dictionary_of_exploration_geophysics.pdf
    • http://xisumagogali.getenjoyment.net/50671181794.pdf
    • http://xizabif.22web.org/kuxulu.pdf
    • http://nejuwenazi.iblogger.org/27558995073.pdf
    • http://tamasolesodaj.mypressonline.com/behavioral_management_theory.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gerireg.epizy.com/87786502149.pdf
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_6626d7b03c974071aa1f31d4afeb0742.pdf?index=true
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_7b558f3ab26e44aeb3a2a2009efd6a0d.pdf?index=true
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_c83c71cf24ed4b9aa140d1798bb4da12.pdf?index=true
    • http://nunitew.rf.gd/13246172501.pdf
    • http://xoxexanizeb.epizy.com/id_card_size_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017125.bin
d389c5550b7eaa9f1d430564c937d5a353a0cfcb15028b9a6a3cad66e61f4d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17125 5160 bytes
font_01_sfnt_off000182a6.bin
275efd1d45309de7d802f5e1096a002d4ea9ebe20d6ee08ef2d22722e9c4c55e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182A6 13772 bytes
font_02_sfnt_off0001ad0f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD0F 4324 bytes

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