Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ecb5ae96159c2a…

MALICIOUS

PDF

80.6 KB Created: 2021-03-18 21:15:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3598fd9de94ccf4ccc28b38c0ae78bb5 SHA-1: 9b3bce1e0fb59e450a4c13c4ea266dc1cb164fbe SHA-256: 34ecb5ae96159c2a0fc13c061ff6e235de1fa1285635b938d7913194877a8b1d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. The primary malicious URLs identified are botokaw.ru and gisagubipiwige.22web.org, suggesting an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=red+rising+tv+show+cast
    • http://gisagubipiwige.22web.org/90434682080.pdf
    • http://serdyukov.pro/49805138708mzmv8.pdf
    • http://kimiter.medianewsonline.com/cch_chuyn_file_sang_file_nh_trc_tuyn.pdf
    • http://galoomer.online/kejekeq8td8.pdf
    • http://pankreatitum.ru/the_expanse_season_5_release_date_uk447o4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lukepepe/indianapolis_cbre_market_report.pdf
    • http://nimunofat.epizy.com/78415128006.pdf
    • https://s3.amazonaws.com/baposivarabuj/oracle_database_19c_vs_11g.pdf
    • https://s3.amazonaws.com/vasofirida/72858083316.pdf
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_bdd96f98242f48b99f064a6f82d14ab5.pdf?index=true
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_a9311677e157433cbcec6dd46b3444d5.pdf?index=true
    • https://s3.amazonaws.com/penale/i_m_not_afraid_anymore_song.pdf
    • https://s3.amazonaws.com/vukusa/global_competitiveness_report_singapore.pdf
    • http://geforagegi.atwebpages.com/vadupefunafuludedexa.pdf
    • http://zedotedifajo.epizy.com/98056674864.pdf
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_2ff8b56c97d04e11ad2f6cdbfcd387c5.pdf?index=true
    • https://s3.amazonaws.com/dinilederu/77828339577.pdf
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_4edf3c8bcf3c4ac0bd89f79a05d29bfa.pdf?index=true
    • https://s3.amazonaws.com/nisiwanolom/9302472843.pdf
    • https://s3.amazonaws.com/telasebisu/hp_ultraslim_docking_station_2013_power_adapter.pdf
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_593884706fdc42bb9cd5a4df7e44a9e3.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_off0000fb03.bin
29d1ff5ba954c681db27dbe9c7921bc632cce2ed8498eeb14d72c982821000a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 5328 bytes
font_01_sfnt_off00010d39.bin
a9cfb8b0ee82ed09a9b15607b446accf0cce7d01488df4666521ae670ab3658c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 11808 bytes

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