Malicious PDF — malware analysis report

Static analysis result for SHA-256 974ae34b2dcbde96…

MALICIOUS

PDF

71.3 KB Created: 2021-09-07 19:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 194436db7aa5f23be8cdcbd947744002 SHA-1: 715f2bf33ee1173be35fc31925a4b7fc5baa8118 SHA-256: 974ae34b2dcbde968d8283414ffb017010fedb5165dc256f4bbd8161eed659af
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it is designed to exploit user trust and lead them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/87899892963.pdf In PDF document text
    • http://flygarfield.net/userfiles/file/fufobopomewup.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/28825959281.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/xalowozexasixegitakulero.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/23721932674.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bidowewun.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/88121689224.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/9joii8o0gotfms5mlciti36fc5/pumotodamasewijufikular.pdfIn PDF document text
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/pujojafemorononakedi.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/1c4888d309b7e54ee30043c158b6e811/dalosetamafutow.pdfIn PDF document text
    • http://mcutech.net/files/jobitoxovixudupi.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/2e5e1d08ccf76e84d6f250c58af9f09d/siminubamaxujugo.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29ce65559b---suwerizajuzusiweloxisew.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/vevigaro.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/bofagabum.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607701d6e5a1f---98303419726.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/eb87f65f39d9832586ea4a617cca5299/63039733187.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/mosulenoribupurewokizedik.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/17189828023.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160e16ab3c96dd---kevobad.pdfIn PDF document text
    • https://ibextrail.com/editor-images/tisapufekugiwurafovos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=standard+operating+procedures+manual+for+human+resourcesPDF 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_off0000b5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF4 11244 bytes
SHA-256: 2bd72132a7d408ce2a1fcff752d9672b2c7dded9ad844214b90daef287838970
font_02_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 15752 bytes
SHA-256: 02d72c72a56bc3afe1ae6f0b337c5538bf16cebf58b84b39fae79c52efb0a9de

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