Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb2adffdf963d9a…

MALICIOUS

PDF

77.4 KB Created: 2021-07-31 14:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7de4916c58c7164f898938d5162a64e9 SHA-1: e84823ee6d4d677401ae73d68d181ed9c5860576 SHA-256: 7fb2adffdf963d9aeda087c1985b176d7be7febd6aa5e87d86a64a98f2e923b6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it is a link farm and a payment redirection lure, suggesting a Business Email Compromise (BEC) or phishing attack. The embedded URLs point to various compromised websites, likely hosting further malicious content or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://harrisitalia.it/uploads/file/rebekejoru.pdf In PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/majuzedibef.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/052dadcac6ca6ffd871e69b4941f14ce/newevitawekiwovupigawekad.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/mofojusek.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160886829c10f3---59635193714.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/0659a4b6b1d13591728541cea297653a/nivimupole.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0a00e83cc---5744434838.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d42ae2115c---87880031094.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4086dce2014587546fde32482d270ee8/36406933794.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608e68bf9d506---vegaluv.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/98765460961.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084f8023bd70---vobefoluxaxo.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/80b4038b8ea2224318d8a83a63377171/bewuwofusakekepirigus.pdfIn PDF document text
    • http://grandfiltr.com/files/file/98394564333.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/pepokozifefamesedupera.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db29f9b5cc6---52038461088.pdfIn PDF document text
    • http://garderoba.sk/images/_file/boraki.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/nipowupibupamo.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d364cc00df---gupada.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/0062b854b4e8d88201d7cefaad0bf518/koganajuxalulumonibo.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/49448159792.pdfIn PDF document text
    • http://tatnhapkhau.com/ckfinder/userfiles/files/gubakudima.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/87775882416.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ec8fbeebb4a856c842578409bbd5377/lawikozuwapedelular.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=amharic+keyboard+software+free+download+for+pcPDF 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_off0000ca9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9A 16148 bytes
SHA-256: 5b4c3c355fe2ad8b092d9dc30eac2c5c999e65176df30b90cffc21e0e7b31f95
font_01_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 11300 bytes
SHA-256: 4dace75a49247d15f1a5be32b2fc0118b738802fda2ff6cbef97f4e32a646268
font_02_sfnt_off00010e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1