Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4e7c2f8f01966a…

MALICIOUS

PDF

90.0 KB Created: 2021-03-21 22:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 40c89b2af2eba3e5fc5eb19a17ae333b SHA-1: bb42d983d5361ceed78aeb504ca9f2cb2d961dc8 SHA-256: 5f4e7c2f8f01966a97ccfbadb8cee840da0c4fb08a393bd3247168c6e5f28d04
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, with a primary suspicious URL being https://soxebez.ru/strik?utm_term=imaginarium+train+table+review. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm hosted on disposable domains, further indicating a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=imaginarium+train+table+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452171/normal_604e98af2c03e.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/41890018310.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/OuhbheQ/buzexarazexosoparimad.pdfIn PDF document text
    • https://cdn.sqhk.co/fidegelotag/32Bk2ib/the_wild_darkness_ruins_of_light_2_location.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/hhiqjFD/90891355846.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/M6gcxjj/lexinoziru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_605162d11d09d.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/nuvokebiwivaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412592/normal_5fe3c7d05bd15.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/my_liftmaster_garage_door_opener_will_not_work.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_3c6f7d789f58466c940a727e4db19980.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f73d6a-09ca-4a12-9306-e86fa27b471d/how_do_i_connect_my_canon_g3000_printer_to_my_wireless_router.pdfIn PDF document text
    • http://tosivasode.epizy.com/adverse_event_reporting_system_europe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62766fec-050a-4571-9fbe-7e1f80bcf866/love_story_lyrics_taylor_swift_karaoke.pdfIn PDF document text
    • http://wuburujezajewix.epizy.com/who_kidnapped_janie_in_the_face_on_the_milk_carton.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_cb12ff96ec75403fae018f609b469bef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c99d349-7117-4668-9981-fae1f8549f91/90579920923.pdfIn PDF document text
    • http://fanurumuge.epizy.com/79579109043.pdfIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_7e16c001552d45dd8135223661763970.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7982458d-0898-4e30-a55f-0ac47e1ee272/teeter_hang_ups_youtube_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a56da30-55aa-47ba-a2ac-e4becb3e89e0/66490265213.pdfIn PDF document text
    • http://vuwepowav.epizy.com/24483912849.pdfIn PDF document text
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_6aef0ba288144170a546547ae56d5153.pdf?index=trueIn PDF document text
    • http://pikaderobiw.atwebpages.com/61589152093.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_off0001205d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205D 5056 bytes
SHA-256: acf59e01dc96d82e85c31cd960d8a75bf9f9c8dc0529968a53439dd7e2b6e064
font_01_sfnt_off0001318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318D 11544 bytes
SHA-256: 8ed029acd8a81519755f257887fe3c8bd00eb453791b89ea1b31781d0bca7bb0