Malicious PDF — malware analysis report

Static analysis result for SHA-256 425a9329c57c91d7…

MALICIOUS

PDF

76.5 KB Created: 2021-04-30 14:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7cee69f6269dc5c7699a2628b5d691bf SHA-1: 2423f9a7529f93d85e020a2623285b3b0a5697ba SHA-256: 425a9329c57c91d7956988097cf330a0ae2691723475dbec8873b5600bc5b746
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 a high probability of maliciousness. The file contains numerous external URIs pointing to disposable hosting domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect the user to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://midufefew.ru/strik?utm_term=how+to+use+directions+hair+color PDF link annotation
    • http://fofumumitem.medianewsonline.com/26426789578.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/on_green_dolphin_street_miles_davis_chords.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/tunixomaj/hiNhcJR/libro_sagrado_budismo.pdfIn PDF document text
    • http://pravagims.net/xanometavokidegojapikodyug2l.pdfIn PDF document text
    • https://medumoxil.weebly.com/uploads/1/3/1/0/131070238/tijifuxawagirasana.pdfIn PDF document text
    • https://duwaxitim.weebly.com/uploads/1/3/4/3/134312722/midetodezimufawul.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/gshvf0b/lenovo_chat_support_hours.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/0c804378d0c4d6b.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/handbook_of_clinical_anesthesia_barash.pdfIn PDF document text
    • https://feboratopaw.weebly.com/uploads/1/3/1/3/131383734/memesafapa.pdfIn PDF document text
    • https://bepagiji.weebly.com/uploads/1/3/4/3/134352373/fidulorumumosen.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/88257125706.pdfIn PDF document text
    • http://meetcabinets.xyz/29869233608qb9lc.pdfIn PDF document text
    • http://bezprovodov.guru/18658817071u57mg.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/katzung_pharmacology_review.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.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/3091fa1c-be01-4d67-a788-59dfab5ca64c/school_for_adults_to_learn_english_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5f1f6f-a9f4-4510-937e-336cf6fb3eb0/royal_mail_international_parcel_tracker.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/zoropetezefa.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/17828824438.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_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 5080 bytes
SHA-256: 592fbde9e40c724a005b462fa55b0f5151bc21852634c115ddd212e40b51c4ee
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 11348 bytes
SHA-256: b68f9d53f4c06409d9ef1309206bdf2e74c794b826c08b6ce21675968759f49c

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