Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44adf3f92e3c7da…

MALICIOUS

PDF

74.7 KB Created: 2021-03-31 09:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a54a4acbb311161b46b7bf86820cbc2c SHA-1: 586405e799a7478452f5c6a4e3187da3c898dcd6 SHA-256: f44adf3f92e3c7dac25b28c91d3b10e501a7ff07cabac2200cc096c2caa64cd9
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://seumenha.ru/wix?keyword=accounting+texts+and+cases+pdf PDF link annotation
    • https://cdn.sqhk.co/fefamuve/ieVjazB/33153435008.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/HEjdRhd/kotebejimowajuwipal.pdfIn PDF document text
    • https://cdn.sqhk.co/rizikodeni/gZMlrJX/rekutaganezi.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/giNidhi/20466876162.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/DJVichd/reversi_othello_tactics.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/96368503995.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/aOjajdR/vixarada.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/erobOjj/93659635847.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/9Ejhw9F/dijelo.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/ghZicns/air_combat_racing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/befarekogol/vocabulary_practice_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/bogan_movie_senthoora_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/dun_and_bradstreet_european_comprehensive_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/shimano_r2000_price.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/adjective_exercise_for_class_7.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/10453283046.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/maritime_law_salary_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/59845103169.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/power_of_vulnerability_brene_brown_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/home_design_software_free_for_android.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 5252 bytes
SHA-256: 4dcd6becbca6dde55484c8f8cb8b99c0afcaac9c7a508193b7fbbdeee3e5a9fb
font_01_sfnt_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 11012 bytes
SHA-256: aeb331454b8a2dea163262a3e0a85eeeb8bafbcdeebc808166d3b3e3253bc3a6

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