Malicious PDF — malware analysis report

Static analysis result for SHA-256 adebfdb97d516a5f…

MALICIOUS

PDF

84.8 KB Created: 2021-03-23 04:10:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 341886121c2fa51a33c409e29b01f532 SHA-1: 3447f08ac34b51b027c55ca97951cc07c4290ca2 SHA-256: adebfdb97d516a5fdeb286ccd8c1e884a9315a442eeff374d5b3ae5a96096aff
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a mass external PDF link farm and an embedded URI. The primary malicious URL, 'https://soxebez.ru/award?keyword=les+faux+amis+francais+anglais+pdf', suggests a phishing or scam attempt disguised as an educational resource. Although no scripts were explicitly extracted, the PDF structure and embedded URI point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/award?keyword=les+faux+amis+francais+anglais+pdf
    • https://cdn.sqhk.co/kufalavoxig/NuGiche/cat_running_around.pdf
    • https://jimutovila.weebly.com/uploads/1/3/1/8/131856698/8620081.pdf
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/tevalimofepiri.pdf
    • https://sesubovokur.weebly.com/uploads/1/3/4/3/134311777/gudatugo-mevozes-wufuba-ridexetis.pdf
    • https://cdn.sqhk.co/gujowaxexag/hcAiehf/nowoxepufavifavumesufi.pdf
    • https://tebozelekunoton.weebly.com/uploads/1/3/1/4/131453588/8037787.pdf
    • https://gavurefeg.weebly.com/uploads/1/3/1/0/131070452/pogojuwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fe2e0d20-9e3a-4934-8fb5-dba2538d2f36/multiplication_and_division_of_fractions_worksheets_grade_7.pdf
    • https://uploads.strikinglycdn.com/files/ae4a271d-26e6-4ebc-8cbb-4c42dc18974e/piano_method_books_for_older_beginners.pdf
    • https://uploads.strikinglycdn.com/files/45c6f1dd-5a5c-47d4-a917-5648741686cb/jukesejepozef.pdf
    • https://uploads.strikinglycdn.com/files/77fa0c6c-c080-4c7f-941a-9abb2055ec75/20113609236.pdf
    • https://uploads.strikinglycdn.com/files/36a6ef62-374d-4ef8-9918-44ab936661a1/139217400.pdf
    • https://s3.amazonaws.com/silubebebefuju/integration_of_sin2x_cos5x_dx.pdf
    • https://uploads.strikinglycdn.com/files/713e8a4c-932a-4fdf-8c16-2f3b69d2c3d9/19319248227.pdf
    • https://uploads.strikinglycdn.com/files/62f19e06-07fe-4b89-b697-9cb280b02db4/regelotupewun.pdf
    • https://uploads.strikinglycdn.com/files/1ae4789c-0fb1-4fc3-88ee-27030620054f/kenmore_oasis_washer_parts.pdf
    • https://uploads.strikinglycdn.com/files/00f236b2-c82d-4d06-80df-816715636480/39876976402.pdf
    • https://s3.amazonaws.com/xifabilejilab/diy_painting_kitchen_cabinets_without_sanding.pdf
    • https://s3.amazonaws.com/nufidibodudulad/systematic_literature_review_guide.pdf
    • https://uploads.strikinglycdn.com/files/04068a3d-46f8-4222-a158-5183b5e56f73/how_do_u_factory_reset_a_kindle_fire.pdf
    • https://uploads.strikinglycdn.com/files/84b123f1-6918-4908-a3b8-c3647a66d223/bazasepujokapuwa.pdf
    • https://uploads.strikinglycdn.com/files/16b986eb-de43-4048-9a81-ae99162cf66d/ubiquiti_nanostation_loco_m2_factory_reset.pdf
    • https://s3.amazonaws.com/kitakilesa/how_to_adjust_rainbird_sprinkler_head_radius.pdf
    • https://s3.amazonaws.com/jemisajoda/fokur.pdf
    • https://uploads.strikinglycdn.com/files/bd9d13ee-61d8-42ce-a8fd-60fc960e9bf9/is_there_going_to_be_another_the_darkest_minds_movie.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c6.bin
e90c7c811639d00d553790b6b55a9a497f2057621645d020b32e7f3cf277b402		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 5484 bytes
font_01_sfnt_off00010862.bin
a951f6b81d2f5c930b77870470666d488cfed564bb4e3265d5a5a433bbf58fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10862 12320 bytes
font_02_sfnt_off00012ed3.bin
292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 16096 bytes

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