Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f7f378603c8a85…

MALICIOUS

PDF

75.8 KB Created: 2021-03-31 08:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2bc3a511be82daaf3c9f2c5c23b7f30 SHA-1: ef8ffb5127f0f1b2cdde538fa2aa1a622ab8bae1 SHA-256: 00f7f378603c8a8536acf9a501f37996436d6bc021d4cda0b056790d99c4ee2e
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'kuzutuzo.ru/award', suggesting a lure to trick users into downloading further malicious content. The document body, though heavily obfuscated, likely contains elements related to this lure. No scripts were extracted, but the presence of external URIs and the malware detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=anabasis+pdf+download
    • https://cdn-cms.f-static.net/uploads/4369179/normal_6009f635c7773.pdf
    • http://temilops.xyz/which_will_nick_drake_tabdthyy.pdf
    • https://cdn-cms.f-static.net/uploads/4383689/normal_601d7861d24d2.pdf
    • https://cdn-cms.f-static.net/uploads/4478928/normal_602836201118a.pdf
    • https://cdn-cms.f-static.net/uploads/4426423/normal_604cb9e859448.pdf
    • http://josuwuwopow.22web.org/intermediate_2nd_year_zoology_textbook_download.pdf
    • http://money-team.site/fuentes_fijas_de_contaminacion_del_airepkr9q.pdf
    • http://netewe9.xyz/california_maternity_leave_law_for_fathersw37mm.pdf
    • https://cdn-cms.f-static.net/uploads/4405674/normal_605137805021d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bifadiwuwileji/creditstacks_application_guidelines.pdf
    • https://s3.amazonaws.com/jakujakula/22801168322.pdf
    • http://pavogojewef.rf.gd/jimoxowunurifetapok.pdf
    • https://uploads.strikinglycdn.com/files/22b309a3-4428-4ac9-96a9-dc9507aa3aab/better_than_ever_lyrics_my_little_pony.pdf
    • http://tebafifara.rf.gd/poultry_layers_business_plan.pdf
    • http://jidutibezerediv.rf.gd/doruxuwabosasonomevovira.pdf
    • http://varakofobugomo.rf.gd/practical_design_and_detailing_of_steel_column_base_plates.pdf
    • https://s3.amazonaws.com/dazutun/studio_ghibli_jazz_piano_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/fd010a9b-f347-4357-bee9-51e10286c311/straight_through_utp_cable_color_coding.pdf
    • https://uploads.strikinglycdn.com/files/5c26056b-3359-471d-935d-f11ad959c723/9815170381.pdf
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_e6af843faba74b6b99ebbb46f664c7f7.pdf?index=true
    • https://s3.amazonaws.com/vexeliku/dawosetaruduxagu.pdf
    • https://37dcb74a-b492-4e6c-94d7-6984b04a3d7f.filesusr.com/ugd/01eaca_65237579f01b403a865a22bead539caa.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_off0000e872.bin
19c93ad20d63304b5baa8398e9eef679ae2cb0fee75611de10893b936061fc0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE872 5160 bytes
font_01_sfnt_off0000fa25.bin
5e6743a5d1c8bf7e166555694caa218973fc3a6593fdbff915a7e1040ddf85a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 12180 bytes

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