Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5ab1e91c556924…

MALICIOUS

PDF

77.5 KB Created: 2021-03-10 23:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: aa50048bc4f5a8e4fff72f622bece5b9 SHA-1: 7391ecbb0a45300910c706847d3c3a948dfa57d1 SHA-256: df5ab1e91c5569245d1937bd032d7a46417b81a161a852e751cb1e071119d68a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one notable example being https://bologen.ru/aws?utm_term=nixon+watch+battery, suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting, likely to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/aws?utm_term=nixon+watch+battery PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464732/normal_5fc916205b153.pdfIn PDF document text
    • http://vugivanasidej.22web.org/85629902387.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5fc5afb6bebd5.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/the_dark_tower_7_first_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454168/normal_602a0c252f480.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369502/normal_5ff2aecc842a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dovunufesesiz.onlinewebshop.net/nra_shooting_range_sourcebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f068cdde-477d-4f30-a503-fdfd7b797bbb/17591824250.pdfIn PDF document text
    • http://bimimikojawador.rf.gd/54518895851.pdfIn PDF document text
    • http://rebokomixuxoj.epizy.com/25730693319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf2baed-d2b3-4913-8cfc-2df5554e3322/pexazemugedudasatus.pdfIn PDF document text
    • http://lumaxixi.epizy.com/nso_marriage_certificate_online_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fda4fcc-a513-487f-bb2d-7b238098df5a/62030983629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8105c812-033d-46ef-8454-1c955c5d119c/59522323069.pdfIn PDF document text
    • http://busapow.rf.gd/sesadefovojobolabelowuzo.pdfIn PDF document text
    • http://lofupiwosilabo.epizy.com/what_was_tonights_new_york_take_5_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7835e627-041a-403a-a57b-8754af37a7fa/viewsonic_projector_pjd5155_bulb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831f9a66-a745-40a1-99f1-283553d899fe/pejibixinopofejokitisu.pdfIn PDF document text
    • http://pavabiza.atwebpages.com/nutri_ninja_pro_blender_good_guys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79537832-a8f3-43e5-980d-6ba5f5d583e4/what_is_cloud_security_posture_management.pdfIn PDF document text
    • http://kivarutumo.myartsonline.com/autocad_electrical_free_download_for_students.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/riduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bebc8aa-d61b-43a7-a157-c80cca6ca879/kufovub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 4836 bytes
SHA-256: e712675f42cae5232d72e6f1dfa7e28c68f13fae8689577d9a22a18516bef644
font_01_sfnt_off0000f5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CA 10912 bytes
SHA-256: c952f0aa0d37e01b7840c4af429faa527da5f82e5163f22c34ea7dc5777db698
font_02_sfnt_off00011ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3