Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f10a164f2dc1077…

MALICIOUS

PDF

90.9 KB Created: 2021-03-11 19:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9751931981ac1057bfb83264b64a490 SHA-1: 2b6e08ee2e1aecfd2e23baf85075a209af521985 SHA-256: 3f10a164f2dc1077bf58e994d8bcb3a82ae871bc492b05aa26f764d1fbf6b052
96 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware delivery attempt, likely using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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
  • 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=how+to+make+coleman+fuel
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6018ae9429651.pdf
    • http://freds.space/cant_connect_foscam_to_wifinnjei.pdf
    • https://static.s123-cdn-static.com/uploads/4366407/normal_5ff7660ea36e0.pdf
    • https://wojanoxunoliwam.weebly.com/uploads/1/3/5/3/135394081/nuritix.pdf
    • https://zudejafig.weebly.com/uploads/1/3/2/6/132681624/ef7848b7c36.pdf
    • https://static.s123-cdn-static.com/uploads/4371020/normal_6003d770d45f2.pdf
    • https://cdn-cms.f-static.net/uploads/4448124/normal_6046e0d83e05b.pdf
    • https://cdn-cms.f-static.net/uploads/4504554/normal_6022558bb8ff7.pdf
    • http://dimax.website/char_broil_grill_recipes1dge2.pdf
    • https://static.s123-cdn-static.com/uploads/4410431/normal_5fe314d478b55.pdf
    • https://raguwamirib.weebly.com/uploads/1/3/4/6/134630778/01fc70f1.pdf
    • http://torchland.xyz/78507358296s090x.pdf
    • http://detonic-ro.website/esl_adjectives_to_describe_personality7jj4c.pdf
    • http://porizaritofo.mypressonline.com/nofexaxudidoremor.pdf
    • https://gumewixolasadaz.weebly.com/uploads/1/3/4/6/134659592/gufinadafamulu.pdf
    • https://wudegilunukoga.weebly.com/uploads/1/3/1/3/131379548/8387435.pdf
    • https://static.s123-cdn-static.com/uploads/4393041/normal_6006a4e1b0820.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fararisujis.myartsonline.com/how_to_pick_up_walmart_grocery_order.pdf
    • https://s3.amazonaws.com/gafedupeba/wesuvepubin.pdf
    • http://vawirir.atwebpages.com/nememadejijukebaxufori.pdf
    • http://pekafujojef.onlinewebshop.net/60522471535.pdf
    • https://s3.amazonaws.com/viwoxuz/94080942384.pdf
    • https://s3.amazonaws.com/vuterijoze/71080117545.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_off0001123b.bin
fc6fa5712fed99633bd729c43535821ed90a6da9c400e5e850dbdb4b033dae8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1123B 4868 bytes
font_01_sfnt_off000122ce.bin
7d4293eb718cb187b7e631b64a5a38bb6c9bf4c55a47f3d15c25daa3719d227d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122CE 10728 bytes
font_02_sfnt_off000147b7.bin
37e7e7e9114bd13ff8332e6897528b8343bfbb4b2dd84d96d31ee0d9080a0a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147B7 16096 bytes

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