Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9d75d59159c153…

MALICIOUS

PDF

80.5 KB Created: 2021-05-17 02:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a156214348bc02076544d534ee65975d SHA-1: 060eb1ec7f7042537cbea7804e78540626bd505a SHA-256: fa9d75d59159c153480865eff35574fbd228a1972381e9521812324c34da486c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'link farm' heuristic indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=el+diario+de+motocicleta+pdf PDF link annotation
    • http://ruwazumusef.scienceontheweb.net/77069074075.pdfIn PDF document text
    • http://favarivizuna.medianewsonline.com/kirugetemuwar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_604492b3a5657.pdfIn PDF document text
    • http://nebemor.mywebcommunity.org/therapeutic_foster_care_vs_foster_care.pdfIn PDF document text
    • https://punafatig.weebly.com/uploads/1/3/1/4/131408139/rekaf.pdfIn PDF document text
    • http://gativatur.getenjoyment.net/26967029081.pdfIn PDF document text
    • http://finomimetafix.sportsontheweb.net/love_story_movie_2019_new_release.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/vexebegakukogarateten.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/m0Ejijb/vexed_tv_show_cast.pdfIn PDF document text
    • https://pupaxutakigi.weebly.com/uploads/1/3/4/5/134579126/3980122.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/5gdjfUi/40273936466.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/jiaQjau/80379540847.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/segoxenefigugawox.pdfIn PDF document text
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/pitan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447447/normal_5ff89a95066a7.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/V1ijnT9/xilopevozajevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5fe91142e469b.pdfIn PDF document text
    • http://vawabipoxe.sportsontheweb.net/cell_structure_and_function_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372681/normal_6007c14662976.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_6aea67bbf7234e6bba4ecb204c41f9e8.pdf?index=trueIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_aa5a0494cc2b46ebb8b9b2a3d9061383.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_9cc7966336604ade96c5116722f91cce.pdf?index=trueIn 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_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 5080 bytes
SHA-256: 4189d6bdb87aae127b23978b2433d070d99da2654f7aa991a0bb441ddee143ac
font_01_sfnt_off00010b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B57 13776 bytes
SHA-256: 049e9e864783fdc93616d33d947e3ce9c1684f16b83e1c8d015f0ae54aa93d14

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