Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e6b1b8d0417133…

MALICIOUS

PDF

77.7 KB Created: 2021-05-19 05:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f2206f6f948dce8d81ea69e8de42df0 SHA-1: f1d812b88c5cfd163f8e76f6d283ea62634905a7 SHA-256: 75e6b1b8d0417133e67f43e67051d9e96e348b31107530ed3a0cec7fc8023367
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL, 'https://leonvi.ru/strik?utm_term=twilight+breaking+dawn+part+1+download+720p+dual+audio', appearing to be a lure for downloading media content. The PDF's structure and the presence of external links suggest it's designed to redirect users to potentially harmful websites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/strik?utm_term=twilight+breaking+dawn+part+1+download+720p+dual+audio PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a82349-9475-494e-b533-1e9258cba20c/asus_motherboard_x79_deluxe.pdfIn PDF document text
    • http://lewimidofi.epizy.com/gimitoredapikaxuzuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578258be-f226-44e9-98e5-f17b89801e7a/kesinina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289b7f52-9285-498b-8ea8-1ed8bad130d8/intermec_pm4i_not_printing.pdfIn PDF document text
    • http://wajabopekat.epizy.com/delumodonive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd61071e-645a-4c01-a68c-552cfba5721e/mekaginimet.pdfIn PDF document text
    • http://borogibapomad.epizy.com/95114136219.pdfIn PDF document text
    • http://nivobilov.epizy.com/git_branching_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a55415-285a-4f64-a240-94935b0c78a7/kingkiller_chronicles_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4b4294-5c24-4c21-8816-c27c7c5187a3/woxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249549b6-7e53-4a37-851c-52e73644ce80/coleman_gas_furnace_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f554187-3c12-4d1a-a5b7-d5e1f64d8aba/89928686015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c535c5f-816f-4ded-97e7-7e491328520b/miniature_dachshund_puppies_for_sale_carmarthenshire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64dfb147-2866-4f2d-8c55-da49f2c524b2/how_google_search_works_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ba948c-1a6e-43fa-8ec9-286f32f0588b/ford_mustang_convertible.pdfIn PDF document text
    • http://kumugirenukelil.epizy.com/59874487608.pdfIn PDF document text
    • http://xenedotikuja.rf.gd/19827425141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc28f79-8b36-43ac-8d06-050ea34f5db9/can_u_replace_r12_with_r134a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d0b171-a544-42fe-9d7e-56e7d726fd48/nietzsche_twilight_of_the_idols_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6c01de9-c8ce-4c8d-a5f1-7d707239b826/21466619797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58abfdee-238f-4e17-85fa-65d1b0e12a76/vilepomifazawiz.pdfIn PDF document text
    • http://fomideveli.epizy.com/make_apple_photo_books_online.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_off0000ef82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF82 5696 bytes
SHA-256: 6ba67f36918930aa8e9b70bf3e3ad714b94cdbb8fe119bf6183be69e80964ce0
font_01_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 11020 bytes
SHA-256: d20ad1984791588b9f1793584f64af5f9c2207803377e61154b2d4ebdaf66798