Malicious PDF — malware analysis report

Static analysis result for SHA-256 d466c069c508b3bb…

MALICIOUS

PDF

78.3 KB Created: 2021-03-14 03:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 54dce0d3419673db669358566eaa5bc9 SHA-1: 58fa9cfcf7b18cdff3929c81d442ea3ad6b65d85 SHA-256: d466c069c508b3bb28ddd45fc271ee81c598c1534f6faac776e934d940ab2ed1
126 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware delivery. The presence of external URIs and the overall structure suggest an attempt to redirect the user to malicious content.

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://nipisod.ru/strik?utm_term=how+to+use+a+torque+wrench+for+beginners PDF link annotation
    • http://befemoxujutebi.22web.org/totutawigobafetin.pdfIn PDF document text
    • http://muvirire.22web.org/8672506222.pdfIn PDF document text
    • http://zatutajijiti.getenjoyment.net/28573969519.pdfIn PDF document text
    • http://letaraluzim.scienceontheweb.net/anaphylactic_shock_2020.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/49b7601b-9244-4d26-b5f1-f70094717f31/2012_can_am_spyder_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ba9bb8-289f-4ba5-975d-a0981d47c5d6/6._encyclopedia_of_chart_patterns_by_thomas_bulkowski.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b3fcba-d989-443d-ad73-96180b8e1128/kekutuj.pdfIn PDF document text
    • http://belojegepi.epizy.com/collage_online_template.pdfIn PDF document text
    • http://tabumuxiwuno.rf.gd/35286908358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5eebf11-aede-4be3-a454-6c8e5198e809/46192525092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8083f83-e1f3-48fe-a38a-a68a07b129fc/walt_whitman_song_of_myself_interpretation.pdfIn PDF document text
    • http://xatudoxi.epizy.com/philips_avent_monitor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257d6599-8832-46a4-81e0-b6386bb5a669/what_is_advancetrac_on_ford_explorer.pdfIn PDF document text
    • http://bisavosimirot.rf.gd/xaxifopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabc44cf-a43b-4e58-9975-7a5dfa4e2c74/zirata.pdfIn PDF document text
    • http://tejajageduvutu.epizy.com/which_is_the_best_air_fryer_oven_on_the_market.pdfIn PDF document text
    • http://dejanubotikepiw.rf.gd/9293083946.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/32951721497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25844a22-4682-47a6-9e43-7f193d7f0ef1/40740790665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38292f7-8f54-4484-a409-8539f3066fea/harry_potter_5th_book_hardcover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/745d9ad0-aabc-44f8-a2f6-297702e6dc65/dujusuzofevepunekomipemim.pdfIn PDF document text
    • http://gemenija.epizy.com/sports_illustrated_magazine_cover_this_week.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e72b6c5-c011-4945-80d3-50520b6e81d3/69191009620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4ac2fd-eb72-475d-ac4e-f43107f1f3d8/wibadifikarakaxu.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_off0000f3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D6 5432 bytes
SHA-256: e9884f0194d9bdd2ee93591cb16fc5360620306b83ec0ccc70b3bb7c8ea3c8a8
font_01_sfnt_off00010660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 10972 bytes
SHA-256: 45aec856e62c391c024cca53db2ed7c17fd46f10115af5503fb6fc59ddbd5e01