Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c84aa0faf1e7f9…

MALICIOUS

PDF

112.0 KB Created: 2021-03-03 09:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 44ecc7da91dbe6d2410b4c95b8a45723 SHA-1: d34e59d54a00fcc0df186e34de1b2c83708d8e12 SHA-256: d1c84aa0faf1e7f94bf2cd8bb4785c5faa445c307d4c06f59990b95077c5de05
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 and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with a primary suspicious URL pointing to 'vilenefex.ru', suggesting a phishing or malware distribution lure disguised as a football schedule. While no scripts were explicitly extracted, the PDF structure and extensive URL usage are indicative of common phishing and redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=washington-wilkes+2020+football+schedule PDF link annotation
    • https://falojabuvo.weebly.com/uploads/1/3/4/7/134774067/linawupevaka-nosaxupumirefe-wixokubafubo.pdfIn PDF document text
    • https://gukejokofa.weebly.com/uploads/1/3/0/7/130739315/24431f4e1.pdfIn PDF document text
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/e680e.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/dozoxevuwepawemo.pdfIn PDF document text
    • http://podarokinsta24.online/reached_by_ally_condie_audiobookqvlb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411682/normal_6024928d71251.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/sunebuwametiwinabibulupa.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/89578779880r59yj.pdfIn PDF document text
    • http://wei-nmvc.com/alternative_fashion_dress_up_apk_downloadl7pwq.pdfIn PDF document text
    • https://kazilapematif.weebly.com/uploads/1/3/5/2/135293457/5235ef668990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413111/normal_5ffb28726877b.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/rofavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_603d8b822b471.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novogizeboje.myartsonline.com/mipowoboxilatokono.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/nutrition_information_bengal_gram.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/washington_state_licensing_report_of_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/whale_evolution.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/does_sat_physics_have_formula_sheet.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/ganamrutha_bodhini_sangeetha_bala_padam_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/29359915638.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_off00017252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17252 5804 bytes
SHA-256: 4c82aa555027a0b2c086d8b017ace0484489a0c1be04bde8dccb7ef59a5ca310
font_01_sfnt_off00018634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18634 14000 bytes
SHA-256: e382300dba7667468aa0728203cf8ec2f225da33e699880a01c520768f6bbbf5

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