Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe04760c911ff09…

MALICIOUS

PDF

80.4 KB Created: 2021-08-10 21:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c2f11fb9f0c9ac598d625ffd86e8acab SHA-1: abd0fd56a958c0fcb21558e067d56c546bbeee49 SHA-256: 7fe04760c911ff09075a0c8e7d703752b2d5a0e910a75f5811f245a82e76ad32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains a link farm pointing to multiple external domains, many of which are hosted on compromised CMS upload directories. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/nsaq6oglhqsgkjm8kl24m63lbf/dajobur.pdf In PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/22289702924.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/12f099bad9e70082bf21c72735b6be99/supufijasogu.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/naxuxufutoledutebu.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/rj08j9hqcr83duvbt1poobre99/18040277806.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/76766118410.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161080de2875de---vososesabukuxefi.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/dewikitojatufoxezexada.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021051105103896.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/s7oa1qecmnl4ojmankhj2em6om/73594604109.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/tiguvisegemur.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hnebgfdkp2pjfjmdqkas2g7sl2/57380192707.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/49972124277.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16100aeee4eeeb---vazesirufu.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094676336e09---16905386156.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/6ec671bc813d0a9b78725823fb9d67e1/meremejaduzutizefanudukoz.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/17845777870.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f32b8dbeffc---53514749623.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a51700b262e---guxosivazepebebetebolor.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/afvr39g766dfaqa0jafbk9b6g6/sakojegojagomexibeboj.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/67697684551.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/30536100842.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ijo8c53k04nvisuqh3jr0qg9lt/73340653265.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079721f36f60---namutexusigazuxake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=comment+convertir+des+km+h+en+msPDF 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_off0000d2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D8 18200 bytes
SHA-256: dfb38e451fdf72cf792728e34b4cf7f2821416874747051a6e7e47f905de451f
font_01_sfnt_off000100cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E2 10616 bytes
SHA-256: d6618a2ff14be68b4e4411805b748557520cc2892a7740480c3c54208a38252f

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