Malicious PDF — malware analysis report

Static analysis result for SHA-256 2566f6091a86601e…

MALICIOUS

PDF

92.6 KB Created: 2021-03-09 18:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9aaa417dd406b9bd4984b763d8f33efb SHA-1: 51b187c32d1462869c6e3fdafb7cb1def084d403 SHA-256: 2566f6091a86601e038e3f8cabba2c9e36e30b7b688397b13fc2ecc35dabbcfe
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The PDF's structure and embedded URLs indicate an attempt to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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://jacksth.ru/award?keyword=accords+guitare+jazz+manouche+pdf PDF link annotation
    • https://vedaputenada.weebly.com/uploads/1/3/5/3/135318287/8496527.pdfIn PDF document text
    • https://bitabado.weebly.com/uploads/1/3/1/4/131436956/dejukuli_vekamafotok_punugabi.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/1994988314.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/what_kind_of_character_is_the_nurse_in_romeo_and_juliet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_5fd77769a528f.pdfIn PDF document text
    • https://pabelazulutibus.weebly.com/uploads/1/3/1/0/131070827/9dd30a009864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378383/normal_5fe26609b6413.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/kamikoril-gopigalukonux-rodeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fd79ebe5cdf3.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/best_resistance_band_exercises_for_chest.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480750/normal_5fd1ba4cb6568.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5ff511276d12b.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/35905438701.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/zupivopivuruduginala.pdfIn PDF document text
    • http://paxijivatebul.getenjoyment.net/94369392320.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/36658051418.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/996a5ddc-c307-419d-8760-4ea40a962b55/prince_of_persia_full_movie_download_filmyzilla.pdfIn PDF document text
    • http://bebojivim.myartsonline.com/rarosipizogugurum.pdfIn PDF document text
    • http://dafukip.myartsonline.com/lanuruboxavuz.pdfIn PDF document text
    • http://sofibimibojas.myartsonline.com/kill_team_core_game.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/what_is_the_definition_of_a_guardian_ad_litem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c5ac46-625c-4046-ac75-21821980627f/why_was_government_of_india_act_1935_introduced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58190d51-a3e1-4017-810e-0d6786c83299/bissell_cleanview_pet_rewind_deluxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9870cd6f-2441-426c-a0b6-021390d6a84c/bayliner_capri_parts_catalog.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_off000124c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C7 5652 bytes
SHA-256: 14a9f629405bf7a2205750cea99ed7f6dc760c7cd508cd47c7395267e6e173d8
font_01_sfnt_off000137e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E7 14456 bytes
SHA-256: 161ef1e6764b3c294a6fa0639c74a42c4a23626edbeebcbfd6d2baf2d6d42578