Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d363dd7d20d774f…

MALICIOUS

PDF

107.6 KB Created: 2021-04-30 11:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 78eda6f5f9760fcc2ac098f2f22133ac SHA-1: 3cf527f624077c73fdc81fae99879ea03d5327f6 SHA-256: 2d363dd7d20d774fc54258b7fe3809d3430fb104a115c92bd2ce5cff3693359e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('vilenefex.ru') that is likely used for phishing or malware distribution. The PDF structure and embedded links suggest it functions as a link farm to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=what+is+the+book+pretty+little+liars+about PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482625/normal_60033586467c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_606b530a520a2.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/aptitude_bank_exam.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/adoration_prayer_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_606dc9dac5c58.pdfIn PDF document text
    • https://cdn.sqhk.co/zutigaku/4igjhgc/cosmic_showdown_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/jeA1jhX/shreya_ghoshal_telugu_songs_listen_online.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/govofon.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/bEcjgOY/what_triggered_civil_war_in_russia.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/how_to_renew_my_cna_license_in_georgia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf5d784-bf8c-4a10-92cc-157ffa2f8f6a/como_ser_un_lder_en_el_trabajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea0009f8-c44e-437a-b7b4-56ed8c0a439a/xukavanozaragifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b6b2da6-6e56-40a6-801b-4f3a2127c215/19039613511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b0d725-bab7-4f7e-b129-393a78d7be86/five_nights_at_freddys_4_free_download_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deca676f-ecf9-46f7-b3ac-e50adc5da029/84662155487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd2e594-cf77-442c-9fb5-817e535ed215/97915761478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5a2612-b9be-4db4-9038-9edc0f5d58dd/98975897111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e92fe5-8d2f-476c-9c27-8b0c93d8f587/how_to_print_from_phone_hp_officejet_pro_8600.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/66750637156.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/unir_varios_en_uno_solo_online_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ecadf4-5642-4d1f-aa16-f37a2b09e02b/who_do_i_call_for_oven_repair.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/what_are_the_strength_training_exercises.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_off00016953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16953 5224 bytes
SHA-256: 8177830c04e703159f91c0a562cf346d62534a4cbf1ada2a5eea28ef4d429261
font_01_sfnt_off00017b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B22 11072 bytes
SHA-256: 0e72f4d2444912a6ea2990cf2f329eac5537b2620464c0c9fd1d7f07da9524e0

Open this report in the interactive analyzer, or submit your own file for analysis.