Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3d2efc59810ff7…

MALICIOUS

PDF

88.1 KB Created: 2021-03-09 16:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 552f9e741dc2ce4646fddfe40e71cfe5 SHA-1: 53c9af811b78b6ef0f5927ee9ef271dfd797b8f9 SHA-256: 1d3d2efc59810ff7f2478a08a4a67c9f74e2f3ee2d7268567b08e6d9a017b6df
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external URIs pointing to suspicious domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting harmful 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://maypoin.ru/123?utm_term=travesia+del+desierto+full+movie+free PDF link annotation
    • http://teleporttur.ru/robumekusukuzugiwexik64p.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/fosokonemosuneboxuzorib.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/lejebusiruwepadurorezi.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/32697216495.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/what_is_an_anti_inflammatory_diet_for_dogs.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/jezefoverum.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/el_libro_de_urantia_precio.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/mimepokor.pdfIn PDF document text
    • http://kafidovomiguvo.mywebcommunity.org/when_is_the_new_pokemon_series_coming_out_in_english.pdfIn PDF document text
    • http://getdouche.xyz/filapobotubitidesbcaw.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/what_is_nasdaq_dubai.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/ae390137-e15d-4d93-8fef-28c9266e0978/adobe_photoshop_cs6_keyboard_shortcuts_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6efdaa-f950-4741-ad51-15bb8d39d305/how_to_draw_out_blind_pimple.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/19526167168.pdfIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_e92cf57a668841eda262fd8c4c0f53e1.pdf?index=trueIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_48bad3c79acc4d178e33dfd9be685d6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0cd802-379f-43ab-98d4-babcfbb012e9/asi_hablo_zaratustra_strauss_wikipedia.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
    • 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_off00010093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10093 5064 bytes
SHA-256: 628d425423c721a751d252c462286e6b73272edf3d1eeee6a1168c0d82ee33eb
font_01_sfnt_off000111b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B9 13216 bytes
SHA-256: c4a03118263320b9486ddee71a193e888f7c6fd4aa2e3997b27d783cdb9d8ca3
font_02_sfnt_off00013c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4E 16096 bytes
SHA-256: 88378ffc602f0acbfd9587c7fa3e93a1544965473cb65d93b475df506c0c0795

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