Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b79378017b5d95…

MALICIOUS

PDF

100.0 KB Created: 2021-06-30 23:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 24eb83b2afcb854380cd9f2c33aa2ebd SHA-1: 0b82c7e330dafe5b512e9099cdffc45c0fc60a41 SHA-256: e3b79378017b5d9575fa033919dea530f3cbee65e5ef4a2edd29ae5de0fa50e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to compromised WordPress sites, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing pages. The presence of multiple distinct hosts and the structure of the links suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/9v0paf9hg3nt15hjpo5rpjrnr5/72074802179.pdf In PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/vlnid249mhl88lujrj7qjsvq3j/zifarik.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/59339ad3a57bca1fed7df365535ffc45/89999690878.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad14d30387---jifigawewakolepanobaj.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/bcf0e024f67b962877abb68189ed3438/19490719868.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/fugadodetavewixejes.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db047fba787---gawigoditofekefuw.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/orpcc8g725qv4n4jlv6cd2i60k/91455764098.pdfIn PDF document text
    • http://fitviewer.de/files/file/11423607945.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/23456329425.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/kowijebonuxumelen.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/gtqvlb5pb4qdq47hdq8pr2hkn2/wurixerezavukemazipagefez.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/seximomatekomas.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/28839503244.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c1f665707---4987566230.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869951c7204---49328794174.pdfIn PDF document text
    • http://limoride.net/gallery/file/fipedazus.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/kuxasagatimetuxa.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/78ca5cff70b30deb67ed2d8347d6fb4b/15755545718.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8abc5dafb2---napogali.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/fb52377aece1b8dfdd0fdfb70a4721bc/fanurupokasonifotudubavez.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607da1f008ec0---52897260676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=litany+of+blessed+virginPDF 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_off00011fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000137df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DF 19524 bytes
SHA-256: 65cc3901acaf4e9bf5c827661b65ca586e8f2e0bd8da8f34646429bed7b8bf83
font_02_sfnt_off00016a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A4C 10808 bytes
SHA-256: c5088d6e0ac0de9a278b02031eded1c784e3edf0e36463d54ab42e315173eddf

Open this report in the interactive analyzer, or submit your own file for analysis.