Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d48e11661ff82e…

MALICIOUS

PDF

88.4 KB Created: 2021-08-06 19:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 86ace0a0c554c512a8691c34fecbc67d SHA-1: 260220c333455df632b85009e56d0dfae2acf70a SHA-256: c9d48e11661ff82ea439081c53ce996b8555451069eab618caf0d5f6a1819caf
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests this intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt, potentially leveraging JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://huntic.ru/uplcv?utm_term=how+to+program+clicker+klik2u-p2 PDF link annotation
    • https://binarbaidservices.com/public_html/userfiles/file/bedilukek.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/pivasozadi.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/82086437877.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7e08f0501---ketelojelarumojajoguva.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe345198b0---jadesiwegemumipi.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/fb788ab0c35cb7df534cda23c4768cac/wugonozexululifida.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/18623983044.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ae044ab5c---13275967162.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/84030386924.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc0337292d---rirexusomovunovexab.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/gukupisoxibama.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2b0bf390313a62364ab6b53ea0b8e8a7/15566858976.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16092096209c41---kuwurelu.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/89782275215.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/kokukiregosevofetipesusa.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796dbb9112e---namepi.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021071906112373499.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/63986210321.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/xugetofonuwolanazax.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd508e2311---suwoxifupazekalo.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c62e878f7---30849315544.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/kogagadopinovu.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/nld1mpiq67aa5s8j5dvqepp8a6/burenijunafefaludizolidax.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/68669781247.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/vixita.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9022838dd---filudube.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_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 17696 bytes
SHA-256: c41e5f1d193faaf1724abaa9be84b5b93cf5673aec0ea8e02ceebc1eb02a4d9b
font_01_sfnt_off00011feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13802 10868 bytes
SHA-256: a31c48e94322b4ec2e4603ca0492997c2934580bbd9a9af3e977a11cb3c3544e

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