Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32a77ee45a8b2cd…

MALICIOUS

PDF

71.5 KB Created: 2021-03-28 21:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5115780f7b6debd6bc44a275b2c8af33 SHA-1: 5a44788884d0bd0179b91bb301c619413000258b SHA-256: d32a77ee45a8b2cd7124724ac3200a8c9ec8d8ae1a258152a077c2b91b19a0f6
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download a secondary payload. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, suggesting it may be a generated document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/123?utm_term=set+action+bar+title+color+android
    • https://cdn.sqhk.co/vakanaju/BiceRYV/rose_flower_growing_tips_in_tamil.pdf
    • https://cdn-cms.f-static.net/uploads/4474977/normal_5fdacd9bf072d.pdf
    • https://cdn-cms.f-static.net/uploads/4373779/normal_600ddbca39b4b.pdf
    • https://cdn.sqhk.co/togodawexu/ePtheij/6325835816.pdf
    • https://cdn-cms.f-static.net/uploads/4475382/normal_5fe831874033b.pdf
    • https://cdn-cms.f-static.net/uploads/4410431/normal_601501c3ad963.pdf
    • https://cdn-cms.f-static.net/uploads/4530036/normal_6056080d70f1c.pdf
    • https://rowemuvirota.weebly.com/uploads/1/3/6/0/136089617/neliluwadofaxobom.pdf
    • https://cdn.sqhk.co/libobivole/Igfhfji/basketball_mania_mod_apk.pdf
    • https://cdn.sqhk.co/ximirujusuxo/dLgihii/jolil.pdf
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/e0e73.pdf
    • http://legivupipofu.66ghz.com/remington_700_5r_308_muzzle_brake.pdf
    • https://cdn.sqhk.co/zaweniwefi/geVhclD/homeschool_activities_in_charlotte_nc.pdf
    • https://zigulowowe.weebly.com/uploads/1/3/1/3/131380415/9508710.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_eb7dd77c60bd4c6b8a4134c6e4537447.pdf?index=true
    • https://uploads.strikinglycdn.com/files/42c2d47d-d977-4140-8843-163c2ecc0de6/85550418860.pdf
    • https://a95edb9d-21e5-46e4-bb1b-b1fdf66a5dae.filesusr.com/ugd/09e34a_df0b9f371f8b4a35a41c4957d617eeba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/33131d41-465b-4289-b892-6a7faa3f34f6/best_mansions_of_madness_2nd_edition_expansion.pdf
    • http://tulezij.rf.gd/nujegu.pdf
    • https://uploads.strikinglycdn.com/files/44920a83-8b64-4d87-8a65-abac724a1db6/el_manifiesto_comunista_de_marx.pdf
    • https://ff87c8b5-ca28-4ac0-94ba-218234037d87.filesusr.com/ugd/1d4e4f_5cfd3c0c98b543278266e294e448b02a.pdf?index=true
    • http://rudezil.rf.gd/exemple_de_biographie_professionnelle_courte.pdf
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_15ffa4336f54424280c48b7b3d7e8964.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a98a506a-0b51-4fba-b476-110aa0beabc5/vendor_credit_reference_request_form.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc25.bin
7d15c2ee86646bf7077c25edd77e6d54a6a18c72c4d46e3590cc7bf217811a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC25 5000 bytes
font_01_sfnt_off0000ed2b.bin
f0297a04ef1e4b33e085c7f0431c5e05c25bcb2bed0be67fb50402e2efd41f80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 10400 bytes

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