Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee49ac37cfe3f4a…

MALICIOUS

PDF

76.0 KB Created: 2021-06-27 02:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e9e209300b540fc7847e7fccf75b275f SHA-1: e73ebcbebe2481f67b1d488b4a094c188cfacbf1 SHA-256: cee49ac37cfe3f4ade2e0919f3f91a466e39b60f1cafbf257bae1bbb143f930e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external PDFs hosted on compromised websites and disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the nature of the links and the detection results point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/afe8dc3611f2034c9969c1bb176bdf69/61941255974.pdf In PDF document text
    • http://faradbox.pl/files/file/15796787784.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7375fe0826---kivukigotovulu.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/95697523049.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/toxotefamiza.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/7erqr100ou9luudeck7q1vi6m0/kaxedorovurom.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/25452047711.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c081c348558---telemofagosabejafi.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/60798106410.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/8e7f27587f4c20506ec595403e2c4abe/55723182451.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34af7e3eeb---83873353667.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/5g1g683lfj393e8venq51b0ha6/41247642366.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///poxopatojininijub.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/2156924932.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/40c212d36eb6056ab8081f8a192bb0d2/8715290733.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/suniganuvufeb.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/dovaba.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/haoka58ukdul5mhp0379biktd2/wupuliged.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/23012958572.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/xajafonategebegomojupasu.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/papomudolovukoravipuwapa.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/lezexojesepexizivifug.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/330a38e405f3969d7a30b03823a669bd/kejebixojarasawibumi.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/xifasojebato.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608effabc3a7f---gulakon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=properties+of+exponents+cheat+sheetPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A2 16724 bytes
SHA-256: cd07074d59ab6dfae19813a198ae297410908296aa744bc7180ec7eed0eac9da
font_01_sfnt_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A79 10636 bytes
SHA-256: 419b0a2d3d69c3eb3c3f0f7c0bf66d3685ff4a309306fb3ee5284d6ded7ca927

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