Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5b6ff89cc64d20…

MALICIOUS

PDF

71.0 KB Created: 2021-03-23 00:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fefc8c1e7b9a499008b41e56182642ba SHA-1: 1f1423add72275d365bc88d815bebe9792efa7bc SHA-256: 3c5b6ff89cc64d201fb73e8e3b05e38520ec2c2fbe5479de0f9c78cee0e871bf
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://maypoin.ru/wix?keyword=my+hero+academia+season+4+dubbed+crunchyroll
    • https://static.s123-cdn-static.com/uploads/4476147/normal_600354e38f359.pdf
    • https://static.s123-cdn-static.com/uploads/4368243/normal_5feca0bef3469.pdf
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fca5e4b405c6.pdf
    • https://cdn-cms.f-static.net/uploads/4466664/normal_5fdbeb4982861.pdf
    • http://tokesuditetu.getenjoyment.net/5432679401.pdf
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5ff34d2da9103.pdf
    • https://cdn-cms.f-static.net/uploads/4404500/normal_602995a942f30.pdf
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5fd9737ed35dc.pdf
    • https://cdn-cms.f-static.net/uploads/4454999/normal_602e4ff93b618.pdf
    • http://gebikomuxe.getenjoyment.net/27573444945.pdf
    • https://cdn-cms.f-static.net/uploads/4368777/normal_600dab94892b3.pdf
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5fe2411175fa5.pdf
    • http://kexedeziferu.sportsontheweb.net/jagopofegero.pdf
    • http://siluvuxifebul.medianewsonline.com/getutupan.pdf
    • https://cdn-cms.f-static.net/uploads/4481286/normal_601b1dcfb1ac9.pdf
    • https://cdn-cms.f-static.net/uploads/4380859/normal_6050629a5fda9.pdf
    • https://cdn-cms.f-static.net/uploads/4393035/normal_601b5197d1ca8.pdf
    • https://cdn-cms.f-static.net/uploads/4369328/normal_603434bb8d29e.pdf
    • https://cdn-cms.f-static.net/uploads/4480403/normal_60415d6b8de2d.pdf
    • https://cdn-cms.f-static.net/uploads/4476566/normal_60478c339d2e0.pdf
    • https://cdn-cms.f-static.net/uploads/4425214/normal_6014a4d8d9890.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nizowozutagele.atwebpages.com/pdf_bookmark_editor_online.pdf
    • http://zeteximezoxa.myartsonline.com/bande_dessine_tom_sawyer.pdf
    • http://bifovigavij.myartsonline.com/what_is_the_best_vegetarian_food.pdf
    • http://merovuditipin.onlinewebshop.net/60149599190.pdf
    • http://rujidafedisezu.atwebpages.com/is_percy_jackson_in_the_lost_hero_book.pdf
    • http://nifusotajezunur.atwebpages.com/42792185260.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_off0000d630.bin
c288233da9df537441dc2c9a45e3a5d68437fee5f8e078bcb3d302b66279fc8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD630 5512 bytes
font_01_sfnt_off0000e8d2.bin
e28210495c1526d53ed357e8b8e77023c0d88f4df8b7c67b8b2cbcb1ef824c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 11080 bytes

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