Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab4f57dbd3ccb6a…

MALICIOUS

PDF

70.5 KB Created: 2021-09-27 19:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7196273083b4344a001aa60182cf7188 SHA-1: 7bfae214f93afbe78122d65eeb363db49c40d5fd SHA-256: 3ab4f57dbd3ccb6ad9760f30937030e26eb9b17b89e8afdcda00c8f369467dd4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links pointing to various domains, many of which are likely part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://cabinet-blin.fr/ressource/site-image/files/nowukaxakeditesidutev.pdf In PDF document text
    • https://uslugiinzynierskie.eu/eurostyl/photos/file/bazuvado.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/lojixerameva.pdfIn PDF document text
    • https://lyubomiradineva.com/files/file/33162869903.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/78481669550.pdfIn PDF document text
    • http://24x7taazasamachar.com/assets/ckfinder/core/connector/php/uploads/files/9419813392.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/mepamigakelukukejan.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/worudowo.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/sanurizi.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/75465909629.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/21cef03f1e3081647b4f0377f520b771/nozagazerifelif.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/riwinorowubexebot.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/xurubozefawuwobefupegu.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/13116034162.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/fumaninexukum.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/lejel.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3674200076.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/37156542555.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/44990045484.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/pudom.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/pojovitifano.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16147c8e9d783a---pogizotetujoluxebojozusab.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/97395289473.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/tedewesojutuv.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/47833262031.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/loverowadajisumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=gta+5+emulator+for+android+free+downloadPDF 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_off0000b44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB44F 14832 bytes
SHA-256: 3eb0580a719ff85015e0af2dde868887bf3ed227ac65282e5c493d1bf25176f2
font_01_sfnt_off0000d921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD921 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 10704 bytes
SHA-256: abee192003389651f8524c4ac3681f9be70f1d5fa912976d4532c8e781b38cd7