Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee57230117afed34…

MALICIOUS

PDF

78.0 KB Created: 2021-06-07 21:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 594c6940cd82b98f1cc29573baedb444 SHA-1: 79487f1ea928fdeecbbcbb76ecbbe2f862810494 SHA-256: ee57230117afed346ee694bdc6d6322b00bd06c0d69725a575cd1c55a7a1ebac
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/pbw?utm_term=nuwave+brio+air+fryer+directions
    • https://gexamefirizawem.weebly.com/uploads/1/3/4/6/134668325/rizaxep.pdf
    • https://jafufikatovovew.weebly.com/uploads/1/3/4/4/134481731/famapunofotija_wupemobuf_dimapa_koxatoler.pdf
    • https://wevetajapejo.weebly.com/uploads/1/3/4/6/134636724/932e27.pdf
    • https://meverelalopabij.weebly.com/uploads/1/3/4/1/134108836/xufan.pdf
    • https://jobexevufurol.weebly.com/uploads/1/3/4/5/134526996/motivawase.pdf
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/2628648.pdf
    • https://jolidanovuson.weebly.com/uploads/1/3/4/8/134868646/kifujitukidepifono.pdf
    • https://legopaxazomunan.weebly.com/uploads/1/3/5/3/135396831/db608e3938c.pdf
    • https://fisofomopix.weebly.com/uploads/1/3/4/6/134603918/visajatusekezakef.pdf
    • https://jomopejizudo.weebly.com/uploads/1/3/4/6/134664487/xudizisiguruza-jegoximejomomax-polidot-wukisegi.pdf
    • https://zeduboxaturuje.weebly.com/uploads/1/3/7/5/137502279/4326392.pdf
    • https://paparudedolenod.weebly.com/uploads/1/3/4/6/134686514/jugosupenajixa_zironemonarox.pdf
    • https://rovetizewi.weebly.com/uploads/1/3/0/7/130776299/ruzar-rarimo-fobibirabiza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5c6aa50d-73b0-4c98-a22a-415c7e63f394/10697972119.pdf
    • http://wozixokumo.pbworks.com/f/wonaxezofajijikebejudube.pdf
    • http://papoxuva.pbworks.com/w/file/fetch/144421440/tewanefiremizibapimipa.pdf
    • https://uploads.strikinglycdn.com/files/61f93654-9dbd-4384-9631-710b0fc5db99/tadobuzoz.pdf
    • https://uploads.strikinglycdn.com/files/608e81b9-a47f-402f-be39-ccf6d1498150/esquema_de_fusibles_seat_ibiza_2007.pdf
    • http://palixazoke.pbworks.com/f/how_to_connect_denon_heos.pdf
    • https://uploads.strikinglycdn.com/files/7ed99198-48af-46c9-8018-efef6f18be3d/how_to_get_purple_text_in_discord.pdf
    • http://wasazejis.pbworks.com/f/palabras_homofonas_ejercicios.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_off0000f33a.bin
8296b4a96ab3dcd3491ff96c49c8c0caa45358cb39736a18294b1a32bff7e3dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 5348 bytes
font_01_sfnt_off00010599.bin
99a8edfe32734310d4080bf7a55976b12e451c172ec153ed131680839e67815b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10599 10928 bytes

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