Malicious PDF — malware analysis report

Static analysis result for SHA-256 87bd6c2ff00d5ae8…

MALICIOUS

PDF

80.1 KB Created: 2021-04-25 23:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 505890b086bb9a3329ebc114e73cacea SHA-1: 5758f5f88d89123a334d547a567602faf2a43f4b SHA-256: 87bd6c2ff00d5ae8e8fb21ac810ca64cd3a424741194c57098aadebfab146007
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to redirect users through multiple disposable domains, likely to obscure the final malicious destination. While no scripts were extracted, the presence of external URIs and the overall structure point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=coleman+lantern+lt+17b+owners+manual
    • http://tawaguf.scienceontheweb.net/chamberlain_liftmaster_41a5021_1g_manual.pdf
    • http://favodokoleti.mypressonline.com/arm_cortex_m0_datasheet.pdf
    • http://nutosuvitiraj.scienceontheweb.net/xikoluwo.pdf
    • http://familyit.info/faux_leather_sheets_for_bows_ukmmzez.pdf
    • http://berasowugixo.mywebcommunity.org/27362728616.pdf
    • http://dewisazovuvoxi.mywebcommunity.org/contribution_of_peter_f_drucker_in_management.pdf
    • http://mujoxoluvisukid.getenjoyment.net/acid_rain_in_marathi.pdf
    • http://pakawuwujawo.getenjoyment.net/nike_air_force_1_white_price_in_kenya.pdf
    • http://islta.fun/95363870474dvets.pdf
    • http://kadanijojabuf.mywebcommunity.org/ptolomeu_almagesto.pdf
    • http://toxipoxekej.medianewsonline.com/aprendizajes_clave_2020_tercer_grado.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lekeviwa.onlinewebshop.net/bedroom_design_books.pdf
    • http://mikijanux.atwebpages.com/41911820613.pdf
    • https://s3.amazonaws.com/rovuweraja/introduction_to_computer_science_using_python_a_computational_problem-solving_focus_charles_dierbach.pdf
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_e6fc97595b3f47ea98c3893657bcb616.pdf?index=true
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_f6f341b6c40349a69579fd9caec9e3d4.pdf?index=true
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_b2124de0e7c34f159c0a51288ba5e861.pdf?index=true
    • https://s3.amazonaws.com/nilafafakem/why_is_my_frigidaire_ice_maker_leaking_water.pdf
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_535096cb32744a4ca986e3dd66221032.pdf?index=true
    • https://s3.amazonaws.com/memexelu/82416059093.pdf
    • http://rotufixijisadi.onlinewebshop.net/zopomepusoneb.pdf
    • http://xolevusafo.myartsonline.com/bixolon_srp_350plusiii.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe69.bin
f05794ec5599d6af3502d7ad29f611f6c2a46c532a8f3de0d08a22333eb6769a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 5100 bytes
font_01_sfnt_off00010fbf.bin
58676c3d48fe0bb76e1a64b07cad7bf90ec2905ef918669c7bd75d8136f25865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 10464 bytes

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