Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c9b43b5b79a0e8…

MALICIOUS

PDF

68.9 KB Created: 2021-03-26 00:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-07-15
MD5: 47268d0307a3256140849c79ff6c2220 SHA-1: 9b520ca4e960323aaf614246c9c0cb7ca40d1d14 SHA-256: 47c9b43b5b79a0e8611a7e3c24414272ed75f7827b156dffef7beb6ee95ebe91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, identified as a link farm, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The primary attack pattern involves directing users to potentially malicious websites hosted on domains like mezovuduw.ru and testertumentum.space.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=free+100+chart+with+missing+numbers
    • http://testertumentum.space/bullshooter_by_arachnid_e-bristle_1000_electronic_dart_board_complete_set41lp5.pdf
    • http://richteam.site/36674015501knk85.pdf
    • http://triple-doska4.club/highrise_virtual_world_for_androidqxph2.pdf
    • http://help-feedback-amzn8.xyz/dulopelexarinokobovoflfj1.pdf
    • http://5gusevshop.space/oru_mezhuthiriyude_mp3_song_free_downloadenuvu.pdf
    • http://detonic-official.website/dazobefesudibudufojajou8sj3.pdf
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/1427570.pdf
    • https://pefoduzipim.weebly.com/uploads/1/3/4/3/134371740/zaxuditawakixupojiwu.pdf
    • http://playmarket-online.com/74233339521dgas1.pdf
    • http://antonioit.fun/age_of_empires_2_steam_mac_osbif4u.pdf
    • http://dragonflysagewellness.com/canon_mx700_print_head_errorvuzce.pdf
    • https://vurodotug.weebly.com/uploads/1/3/1/4/131454057/2266355.pdf
    • http://reduslimitalia.website/formato_para_descriptivo_de_puesto0edfl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_e525861651bd470b9cc1b45fe475b169.pdf?index=true
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_b1404647a8c6411fa6f931a725b433eb.pdf?index=true
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_514de0063a6040ce9cd6ac89e8c34de1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/23d40174-e0e9-4329-8507-62626f7a3d6f/16087132066.pdf
    • https://uploads.strikinglycdn.com/files/d388011d-d9b5-4a42-8e89-1ce90d166949/soleus_window_air_conditioner_troubleshooting.pdf
    • https://uploads.strikinglycdn.com/files/2b962f99-0b55-4da0-936e-d283309bb375/fupalavipufobomijodo.pdf
    • https://s3.amazonaws.com/gusule/43676094606.pdf
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_4b9ad82588c64c18ac2539e3395de5a0.pdf?index=true
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_82a1413443d24c4081214ebdee9ea583.pdf?index=true
    • https://s3.amazonaws.com/gapivegek/sapikeke.pdf
    • https://s3.amazonaws.com/gedesisumi/efectos_del_alcohol_en_la_sangre.pdf
    • https://s3.amazonaws.com/petuzutemixuvod/jury_duty_exemption_letter_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d333.bin
4b5a73a0fbe0548241e1dc3b42f0d146a91d9d4e205a87091a0fbd30b22fcce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD333 5560 bytes
font_01_sfnt_off0000e60c.bin
70eb08bfe4c3a1878e1dbbaf9a5adbbe2c40bacd00d7a46f6e95b064677382d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 9364 bytes

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