Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffce3c9cde9ffff5…

MALICIOUS

PDF

72.8 KB Created: 2021-03-07 07:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4557ee2fa07596fc60cc7aeb45f16714 SHA-1: eed3a09e5098a3a0b218b9982fcbc0a315da8969 SHA-256: ffce3c9cde9ffff5b292db50827f225edbe905045ab90dcdfe7343d71e023b41
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, and the presence of external URIs suggests an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wix?keyword=vip+supplement+warehouse PDF link annotation
    • http://matteset-spon.space/55964820388686j3.pdfIn PDF document text
    • http://1xbet-registr.site/human_skeletal_anatomyup31j.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/46892742575.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/will_titan_tips_fit_graco.pdfIn PDF document text
    • http://tutavizukatafoz.22web.org/event_planner_contract_template.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/pulgadas_milimetros_tabla_conversion.pdfIn PDF document text
    • http://medgaj.com/pathophysiology_of_anemia_in_pregnancybii8l.pdfIn PDF document text
    • http://kupawawade.22web.org/discovering_psychology_the_science_of_mind.pdfIn PDF document text
    • http://vawabipoxe.sportsontheweb.net/35677020616.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/62119300122.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/2015_mazda_3_hatchback_owners_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rupesujutiwu.myartsonline.com/wikanufol.pdfIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_1d96d62848fa4f0e9a9ed66a27a1cdf0.pdf?index=trueIn PDF document text
    • http://nexizali.epizy.com/attack_on_titan_characters_names_all.pdfIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_93430bf4e6e34bad86fe8c67f43d674c.pdf?index=trueIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/is_there_a_collector_3.pdfIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_b1067ca5cdd34c3a9aba611e8078122d.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_43d5f715265b475fb9cc0d09bf662d49.pdf?index=trueIn PDF document text
    • http://kopinakitiwodad.rf.gd/34882712841.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_895af4ff39a840caac09b52c741bbef1.pdf?index=trueIn PDF document text
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_1b6bcb771a8a4c6ab240b01e54674a6f.pdf?index=trueIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_938f446b2edd4244819d46456998e0b7.pdf?index=trueIn PDF document text
    • http://piredesoki.epizy.com/ios_13_beta_1_ipsw_link.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_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 5116 bytes
SHA-256: 222916289abe2c21ab62318846634be70636d82f8466ad8d4d9ad6de7a83d0ef
font_01_sfnt_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 11044 bytes
SHA-256: 9a0535b88f34322fceb22a5579845513058f19fd7c07f24b31c74890aa5cb7b7

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