Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ff3b8a15d28a7d…

MALICIOUS

PDF

86.5 KB Created: 2021-06-29 05:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 420700452655f6bd14dba7a45a3d6d55 SHA-1: c1970239801e4b63fd3daef8ad0fa15fff684513 SHA-256: f9ff3b8a15d28a7d3d883e64427db5eabd01eefb490116e8052b59f9c2da7e37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://otohondamientay.com/upload/files/94631304208.pdf In PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160726b6420dab---zemufuwagikuxepogu.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/59933206077.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/hht6rpe6qn7qufdsq741hqlsks/76540410246.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/89df2470daa2925123fad4c07ee3bc58/16233202629.pdfIn PDF document text
    • https://triosms.com/userfiles/file/xakafe.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16094de0a13cd2---kanolenukewovodivuniliviv.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e8dcf663231f4166579d8fd3389bc8b0/41416510452.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/a9f20853457e93b3c98531f4e1693c3b/35068662905.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/dutinisirowigazek.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/36913233467.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/7161208796.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/guvibovuzituren.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/gjuv8c630lrunqipke4bj9on03/74490127603.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/6e6508d78b729f6e6726d90e7b198f5c/55240057577.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/pejeraxidimexasu.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/1vhr7l5kcm49ptb80qgpd2a9nt/68659613707.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/939fef5fe4c2da5aa035841407ed1782/xikebusogibek.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608651454ced6---podivuwazaxikikekamule.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/59c5d9dd281ae9d44b600472edf45657/6809057303.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b38eb95b95---mowajomavajolefat.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/gcfda8jadmdrb5o0iive4ujp9r/13827434917.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094820adea5e---letuvexerejunidimap.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/13052630990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=biggest+gains+in+stock+market+todayPDF 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_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 17520 bytes
SHA-256: a314fd897d9dcf02d53810782ac61d4785e4c0affa22b67eafb5745e1d2ab0d8
font_01_sfnt_off00011b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B29 10924 bytes
SHA-256: 1304267a0090ab8ac2c56ddbdd7c02fbe29e1eeff0f01c777fe7bd25d0eb5b8e
font_02_sfnt_off00013456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13456 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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