Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6203e2eefeb8cb3…

MALICIOUS

PDF

71.0 KB Created: 2021-03-16 16:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0b923a4546aedf78e1c270339a54d2e2 SHA-1: acf0f7097c1a3f5fab30491439b9ebf36bef5968 SHA-256: c6203e2eefeb8cb3f91785aed907cff3702460a935829f67bf5b90f560429b90
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The PDF contains an embedded URI pointing to 'nipisod.ru/award', which is likely part of the phishing lure. The document body, though heavily obfuscated, contains strings related to 'chemistry abc book pdf' and the authoring application 'wkhtmltopdf', suggesting a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/award?keyword=chemistry+abc+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380675/normal_603f74d63d8f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464739/normal_60364ef79d7d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491445/normal_6022e7ee43382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5fd0fe0d9e21c.pdfIn PDF document text
    • http://pumeputokamodo.22web.org/bissell_cleanview_swivel_rewind_pet_brush_not_spinning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421049/normal_603f3a019b839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_60276af8c0c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_6046f7b6ee042.pdfIn PDF document text
    • http://nofawemew.iblogger.org/46277719946.pdfIn PDF document text
    • http://vebilodugisugod.iblogger.org/fender_blues_deluxe_reissue_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvuxugoboboju.rf.gd/anet_a8_build_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0052d1bd-17c1-4cb7-98c2-7225e58e4467/the_7_habits_of_highly_effective_college_students_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13590713-56a1-407d-a2de-4d5ff77399ec/how_to_clean_williams_wall_heater.pdfIn PDF document text
    • http://sotatelovutegep.epizy.com/english_speaking_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca1bbe1-3fd6-46b0-9fae-f58781a2308b/wizagakuwurefejapixitaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d6ab5a-1917-4e3d-938b-5e4a71d23458/2011_rav4_v6_oil_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b97cd7-7d43-4e70-98f2-b8840b87ba52/xamukapalumuxolaxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5e2448-ff03-49da-aa3d-644e43d0cc8e/97488559562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97af9624-d1b5-4a0d-9c69-56d8d6269ecc/scott_pilgrim_comic_book_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e94a1b5-733a-42aa-aaaf-19d353a79ef8/why_is_my_dymo_4xl_not_printing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d6e96c-da7f-42e9-8045-1d23ea3d9eff/what_is_the_book_someone_we_know_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e3a127a-d6ea-4bec-a240-e1d5cf1b4998/the_macro_economy_today_13th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63256f66-6eb1-4a2e-a076-d3edcabf4e27/safufiwajos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b856820e-c1ba-490b-a075-5ee525c0c798/41603228208.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD624 5572 bytes
SHA-256: 12001a35e3e2b488a36beeaf71eae66a86f9bee22901d717bdd2a6ef76fd1097
font_01_sfnt_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 10548 bytes
SHA-256: 5a16283d4f1f267df970b7c2a4c1ebe0411e4a71cc1f023fb6bb24dcf5a8915e

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