Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dacc061c7b68ad…

MALICIOUS

PDF

68.8 KB Created: 2021-09-19 03:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 09a49d2d7d4fe0d1b5dcf97cba0e9d58 SHA-1: dfad2e556dd6a418819b202fbf2bf4fd03470d1e SHA-256: c9dacc061c7b68ad46b9b4e02f459b172bacb71268341d5b1661f5c728d75367
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://itineraire-consulting.com/ckfinder/userfiles/files/xugibuvodelagijusovi.pdf In PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/suxigokam.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/8327ae3227501976d9bf50024717b4f1/subomag.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/87330896302.pdfIn PDF document text
    • http://stringladies.cz/userfiles/9381280638.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/wazasurijixedulej.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcd40c0404---25746365005.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/161400fe57613e---96879468470.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/nebanefogoraw.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/bumuteforebifaw.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/r3sjb58a0qsh2kegn0qtkch1f6/90668368204.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/godejikun.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/33986601643.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/fodifaziwevaxidoperosus.pdfIn PDF document text
    • https://geniodelweb.com/file/24085963691.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/41612465767.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/rajivusoni.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/3032175924.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/82201820293.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/32372818049.pdfIn PDF document text
    • http://groupkaishan.com/d/files/bapan.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/makowivejaxetelipazefa.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/xegiwesuwovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=open+email+attachments+on+androidPDF 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_off0000aff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC806 14676 bytes
SHA-256: 2a469fda754ba04f4ba6f21b06140ec8cb5a96c0b6676202c96e49d24ab250ed
font_02_sfnt_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 10804 bytes
SHA-256: 6331fc3b7cb637f8301f011cae4a604b9b8a12562c27f47c78404e5a3444e14e