Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbc822b437ea6b2…

MALICIOUS

PDF

65.3 KB Created: 2021-06-02 14:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 650f51e608935343711f16e7521329b9 SHA-1: 145639a27e0c2358dbcb4e09e1d435fea49e335b SHA-256: 9fbc822b437ea6b24f94ec39bc2aa49f0bd4f8619865f3d5ebeae9994be41708
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a significant number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful external sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9676

Heuristics 4

  • 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-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
  • 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://queure.ru/pbw?utm_term=bombsquad+mod+pack
    • https://cdn-cms.f-static.net/uploads/4452157/normal_606c992918c38.pdf
    • https://cdn-cms.f-static.net/uploads/4380230/normal_60397159b40c9.pdf
    • https://static.s123-cdn-static.com/uploads/4369316/normal_5fca84febe38a.pdf
    • https://fimozovaxevaba.weebly.com/uploads/1/3/4/3/134366914/tikiziweb-mezalivusowon-xonuvosapikiwoz.pdf
    • https://cdn-cms.f-static.net/uploads/4474448/normal_604ca6a685352.pdf
    • https://cdn-cms.f-static.net/uploads/4480750/normal_605be29d7c2d0.pdf
    • https://jesaguxofugu.weebly.com/uploads/1/3/4/6/134659129/tororevuberoxam.pdf
    • https://static.s123-cdn-static-d.com/uploads/4379220/normal_60aff055d5afe.pdf
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fe3607d872b8.pdf
    • https://cdn-cms.f-static.net/uploads/4426954/normal_6034ee544b714.pdf
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5ffbb55761887.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cb0b5add-c017-4731-9838-a9fa4a596512/how_to_check_container_database_in_oracle_19c.pdf
    • https://uploads.strikinglycdn.com/files/c37f8e70-98d9-4f87-9c28-d4cc9593016b/53757994669.pdf
    • https://uploads.strikinglycdn.com/files/92526e6d-6482-46db-866a-e7acb459c754/how_to_adjust_philips_respironics_remstar_auto_a-flex.pdf
    • http://mefijunov.pbworks.com/f/beethoven_spring_sonata_violin_sheet_music.pdf
    • http://wekibivu.pbworks.com/w/file/fetch/144441465/whats_the_real_feel_temperature_outside.pdf
    • https://uploads.strikinglycdn.com/files/3e927f53-cdb7-43e7-91db-053d3e288a45/can_i_add_apple_carplay_to_my_2019_highlander.pdf
    • https://uploads.strikinglycdn.com/files/da9c27b7-1592-4609-968f-106e29be5f13/paul_tillich_systematic_theology_volume_1.pdf
    • https://uploads.strikinglycdn.com/files/c5ae06aa-4ea2-44d9-88ab-dc12d1a00bd9/how_to_reset_a_delonghi_magnifica.pdf
    • http://foziwedugumu.pbworks.com/w/file/fetch/144448959/48803754019.pdf
    • https://uploads.strikinglycdn.com/files/94122371-5292-43f9-8e5f-dbeeeb3ae3ba/22032846538.pdf
    • https://uploads.strikinglycdn.com/files/7a1e68cf-55bc-4f7f-b26d-d28d77a780a2/83506630954.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d118.bin
ab97ec0b88c96f26734157c635ce9e22516d4aecefd780866ff829c6806bb434
pdf-font-stream PDF embedded font (sfnt) at offset 0xD118 5468 bytes