Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52dc1b72efceb99…

MALICIOUS

PDF

223.7 KB Created: 2021-03-19 18:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 88bc23c4956c929b6e29bd9cc4fc5564 SHA-1: 66486c349a77a062993f262ba1f649657b25a999 SHA-256: d52dc1b72efceb99f5f662463a81384ac8a09eaee06b2bfa1507745c1cd81b3a
96 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains embedded URLs pointing to suspicious domains, suggesting it's used to redirect users to phishing or malware download sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, hinting at its construction and potential use as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://soxebez.ru/wix?keyword=koihime+musou+battle+guide PDF link annotation
    • http://vitrinachel.ru/madixeu9exq.pdfIn PDF document text
    • http://mybiol.site/nukisumebuwufoledaloru8g0ls.pdfIn PDF document text
    • https://faxarumi.weebly.com/uploads/1/3/1/6/131606834/vidumir-kewufile-jixipu.pdfIn PDF document text
    • https://pupalajapifev.weebly.com/uploads/1/3/1/4/131454396/cb1801.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/25136308989.pdfIn PDF document text
    • https://gezagijuxeson.weebly.com/uploads/1/3/1/8/131872295/sidoxitojo.pdfIn PDF document text
    • https://wojadamizaxit.weebly.com/uploads/1/3/2/6/132681796/bonixexin.pdfIn PDF document text
    • http://biomaniix.website/miwomugepegokabuvusewafaw2c3rf.pdfIn PDF document text
    • http://oneitshop.pro/49206235614a7utu.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/sezelosiwusewebu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_934480fd0d394942800053e32c1a5ea9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71da470-910f-4594-868d-638f0fd98d37/after_we_fell_movie_release_date_south_africa.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_f5dc1a781129460798d43078030c745d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b002b47f-df97-48d6-9613-4833c9d57dc2/13674079380.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_3cbd3b715dfe419ba8640501980b9e8c.pdf?index=trueIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_0b12a06616d54c739bca7598f5abe2e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3f95e1-1e64-451a-afab-94a02e62a8bf/does_arbys_still_have_5_for_10_roast_beef_sandwiches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc20dbf0-3e1a-4ed0-86cc-1462a4b29c0d/35922997879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d811b32b-db07-4154-864e-9041f3371bff/how_to_connect_scarlett_2i2_to_mac.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_46540269ef3049e59f29651f7eb73e35.pdf?index=trueIn PDF document text
    • http://girofili.myartsonline.com/kenubopepegevi.pdfIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_90ba1be9f58a41dab5b52316f06dc617.pdf?index=trueIn PDF document text
    • http://zorijefugixor.atwebpages.com/woxamipe.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_off000211d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x211D4 100428 bytes
SHA-256: cfc6e8aff46ffcaa37c09ac0d3c93643990ce05917614d3d9be42d04ef7344ea
font_01_sfnt_off00033737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33737 5252 bytes
SHA-256: 622ca2c76c6e35cf10830c0c2ac194ec0dc978d1ecd15d60a0749b4f03bf187c
font_02_sfnt_off000348f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x348F3 12392 bytes
SHA-256: c235b63260e7c3fd4981c299c9699638f53d5cf5ec45c98ebcb20951d891f904

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