Malicious PDF — malware analysis report

Static analysis result for SHA-256 5188177f1976803c…

MALICIOUS

PDF

83.4 KB Created: 2021-03-28 09:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c60f75186ee429d55caeb3c5e94fc99c SHA-1: f4ad3068cf0b2f159dc360ffbadb62b7386c8be0 SHA-256: 5188177f1976803cb62fe4cba894c6f2353c3566df2e40ef1bd8e3cf3b06845e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

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://dugedepap.ru/award?keyword=hydraulic+accumulator+design+pdf PDF link annotation
    • http://wovuwukotuvoxi.mygamesonline.org/italian_food_recipes_with_pictures.pdfIn PDF document text
    • http://tamasolesodaj.mypressonline.com/adventurers_wanted_book_4.pdfIn PDF document text
    • http://detonicufficiale.website/extreme_balancer_3d_ball8cqww.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/annihilation_online.pdfIn PDF document text
    • http://constructionhouse.info/vokuziwamam4yhw.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/5208722746.pdfIn PDF document text
    • http://znakomstva18x.site/gavopixeganupivafijdi7gl.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/how_much_does_garmin_livescope_cost.pdfIn PDF document text
    • http://blacklaser.ru/665420877817dkd5.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/centrifugal_force_and_centripetal_force.pdfIn PDF document text
    • http://job-finder.space/selenium_c_test_reportp4f9w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xujitezu/48314459548.pdfIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/58872508384.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/how_to_calculate_osmotic_pressure_with_density.pdfIn PDF document text
    • http://masusoxowep.onlinewebshop.net/6208890272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c742604-3b05-4a29-9cb7-657ca207da8d/we_the_kings_sad_song_piano_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68259bae-08c9-44f8-940c-b050503b1899/ipega_pg-9023_pubg_mobile_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcbca2a-5211-44e5-9a66-c921430b782e/89883492649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd9f1b9-9659-40b1-be68-d000774d89a8/what_batteries_does_the_ingenuity_bouncer_take.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/coefficient_of_dynamic_friction_lab_report.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_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 5536 bytes
SHA-256: 1b1d4fcf8844c8203773892966306432ad92ffd5268b4bfa1dd9870d9a89a0d0
font_01_sfnt_off00011c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C88 10484 bytes
SHA-256: cbebe7ffb0a6b75899a968450f007760b621a2f70e97e510c6abbc93e9c59cb4

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