Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2944bcc25acfcb…

MALICIOUS

PDF

88.8 KB Created: 2021-03-24 01:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ad37c6d32c79d9d7d31dc63c803d97c6 SHA-1: 3c09025b66b4eaa1813198672a7706bc00336787 SHA-256: 1a2944bcc25acfcb1608a69ac5f24929d966e50ee18e509c7372f3e4ace28f06
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/award?keyword=astrobiology+nasa+pdf PDF link annotation
    • http://kesisofawa.mygamesonline.org/11532920510.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/335375.pdfIn PDF document text
    • http://xijonofupawulo.mypressonline.com/libro_manual_de_generos_periodisticos.pdfIn PDF document text
    • http://jafixane.iblogger.org/sasavuxara.pdfIn PDF document text
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/7acdd858.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/python_list_remove_all_none.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/zavimowubipijuxetote.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/can_i_eat_anything_for_breakfast.pdfIn PDF document text
    • http://maporivibadiwaj.iblogger.org/97257852605.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/14202332650.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/how_much_does_a_ps3_controller_cost_at_walmart.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/83636087545.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_f9dcc23cb6d64752a41e382507e38717.pdf?index=trueIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_5b5debf4b70441b0b864ac52f07a6f62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogeguva/rerofexizarazutiwipew.pdfIn PDF document text
    • http://fogovulosuzan.onlinewebshop.net/90986268264.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_e54781b6044a47f199e167f5e5ba3516.pdf?index=trueIn PDF document text
    • http://wadoromutisagar.myartsonline.com/automotive_chassis_design.pdfIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_9e5a0c947a684b4a82b2ac5cf1ae6190.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/1794-irt8xt_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/8407633387.pdfIn PDF document text
    • http://kozuwuwupoxofi.rf.gd/31903310652.pdfIn PDF document text
    • http://xapipulasojogod.epizy.com/mudowel.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_6e6353bd88f040e3b95900b6c3b0cef6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/chandu_movie_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/3_bachelors_full_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC7 5108 bytes
SHA-256: 3142783381e46c76a7d5e3c498f1f5c8329223d0c8dbe4468918fddfb7cfb0c0
font_01_sfnt_off00012027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12027 10988 bytes
SHA-256: d7fcb2930e11e39e01e6269e3c87789bc7bde8a9ded8ee6e3583cc0f68b34de0
font_02_sfnt_off000145ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145AB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361