Malicious PDF — malware analysis report

Static analysis result for SHA-256 229009c8704aa969…

MALICIOUS

PDF

68.9 KB Created: 2021-09-27 07:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 06c7eb66494911228e5b086af76ff6a4 SHA-1: a6396dfd29f9494ffb2bb79ebb99f52f1106deec SHA-256: 229009c8704aa969a5c48b53f95fc289be1e2fe124bf4ab611fcdc61faed8605
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on compromised CMS uploads and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of SEO-optimized terms in URLs suggests an attempt to lure unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://allytemp.ru/uplcv?utm_term=fortnite+hacks+xbox+one PDF link annotation
    • https://nguyenhungstone.com/uploads/image/files/gasozariwo.pdfIn PDF document text
    • https://www.cygnusdvlp.in/nitdurgapur/uploads/editorUploads/userfiles/files/8110745138.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/4e7625c498537aabc8dd0361a15e8a36/nufizilotomadivoxokax.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13630427106.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/vijukozinamet.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/vewunowujizuguf.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/34848460519.pdfIn PDF document text
    • https://greenboo.vn/uploads/files/bumafekuxajaze.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/8516935109.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/tosomemasubopizumezav.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/63908792677.pdfIn PDF document text
    • https://totszerdahelyikultura.hu/images/file/sazovuduvamibadebu.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/19298998990.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/2f9dd4c6429bb973cdf611dec19279cb/16230399406.pdfIn PDF document text
    • https://venus-forever.com/image/files/39504911024.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/rujikuriduxir.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/64471595387.pdfIn PDF document text
    • http://hangquangauto.com/files/tisofesunomavet.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/16879773673.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f420a444bf---welag.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/nepazaf.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/p44ukuk7u6anflrdel8rj7c4gc/62458493516.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16144787288edc---fijaxuzujak.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://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_off0000b146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB146 10592 bytes
SHA-256: 2e48d6c796b5309f74e50c9229000d0ec36a4583a7a5b99b890aff56c387e684
font_01_sfnt_off0000c969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC969 14676 bytes
SHA-256: c4656158e876f60d642cf8b1e9eb5d1bcba301429bee7a64eb131eea5f92997e
font_02_sfnt_off0000edef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1