Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa459e92769075f…

MALICIOUS

PDF

83.9 KB Created: 2021-09-06 07:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: af0d6344183cf80ebecee44c087451dd SHA-1: 946e3f86852e72631ed1cc1accb884fc317ac94a SHA-256: 6fa459e92769075f6ac3ab56cda1ace0b781f0787871b27cc04af2c3e085e223
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and ML classifiers. It contains embedded JavaScript and presents a link farm hosted on compromised WordPress sites, likely intended to trick users into downloading malicious payloads. The presence of a "download button" heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/f1d67229f04bbd2e5307f41e04433e0b/pedagulatalovanadogome.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338d2a4a0d5---vibojubarodutebinijuri.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160751be4a0a04---85354602594.pdfIn PDF document text
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/92799068322.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/netikulejimakovamubudajod.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/vobajipavegijot.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/xodupozolujarazokeped.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/57916184a3b15a7d3b044c032c4fc02d/mogavabozubida.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/33468544306.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/12574541773.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/jakakole.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/98034938383.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/mejavag.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b3f49decf---73600448412.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/timowaxufew.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/gems56dk7vmbcj1oo5i4ciu1bm/20606104726.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/29564205145.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/kijawavopifebej.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/11198186389.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/lokajazuredufu.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/2nhl2dg7n86h1jc9a8v20agn97/60897994317.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57385136073.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/11639313175.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/pudozob.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/talixowanetepelikajepud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=english+phrases+and+idioms+pdf+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_off0000de7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 10916 bytes
SHA-256: 9be6fda3f36b264dbf0da1af1b3eb1775e82365f3bf7b49b90afa86ce4c8ae72
font_02_sfnt_off00010f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6C 19132 bytes
SHA-256: 770354c094fd30dbca6ebad5ec9e452fbb97bf8e673f673d261457b23323e3f2