Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f38f9651fd9e04f…

MALICIOUS

PDF

82.8 KB Created: 2021-09-10 05:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f73c162146529835321eac93aa6cf614 SHA-1: 17b1fa32f942543d1e2fb862c9e407d4c95b9de7 SHA-256: 9f38f9651fd9e04ff7ee0c58c043c3d203fae1c563dd64caaedbc5cdf55a0b62
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The document's structure and embedded links suggest a phishing or malware distribution attempt, possibly involving a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://hawkseyetravels.com/assets/ckfinder/userfiles/files/85190700591.pdf In PDF document text
    • https://hsse.hssanesteban.cl/files/56699070933.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/40273780768.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/808af07cff5e1961949f12ae5fa36c1c/tonenezojebus.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/xopuzapa.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f533e9087f---napaju.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/todozitil.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77053848848.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/bezituxefosoxajasuxigur.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/gebovabewiziwomaver.pdfIn PDF document text
    • http://scpt.it/userfiles/files/15688717616.pdfIn PDF document text
    • http://sin-hua.org/userfiles/68219714574.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/zuxeruv.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/72071329297.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ece6449117---waturoliriwata.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/18099571790.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135913509823---79925808047.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/48377596886.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/pajutidep.pdfIn PDF document text
    • http://jcpingie.be/public/files/sejoli.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/nizisupavarojakopotaxuzoz.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/reropovagemimusu.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/vutefomadabetasawo.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/texofegijapixadigipejogo.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/vaduvazanok.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f00495e226---titinipaberatikudajokuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=comment+changer+compte+google+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_off0000dd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5D 10824 bytes
SHA-256: 97190293b76fe8416833b2e052b81323fdf0e5fd73909386291a5fd9c114b57b
font_01_sfnt_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 18140 bytes
SHA-256: 3bfd49dc2fad39915e06665ba9ec280df1f458f888192f2facb10c98a93270ea
font_02_sfnt_off000124d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1