Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5e6439cb7c13f9…

MALICIOUS

PDF

92.9 KB Created: 2021-07-15 23:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2ffa0f30c14fce27a25615f38c363b0d SHA-1: f5cec80e9912739d528fdc5d2b948db5d28c7a60 SHA-256: 9c5e6439cb7c13f9441d9f62da824ede40cd35f71d8ce6b2e49eed9ed868584c
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous external URIs and embedded links that point to compromised WordPress upload storage and disposable hosting, suggesting a phishing or scam lure. The primary attack pattern involves directing users to malicious websites through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://krisoc.ru/uplcv?utm_term=cheat+codes+for+harry+potter+hogwarts+mystery PDF link annotation
    • https://pbchistoryonline.org/uploads/file/91951852640.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d9f4a277---95598862719.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/mifesexogeja.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7rfc9ukchdr6h7virirq7paj01/6734453283.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce9a1e0a1f---91065851479.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091dabbd9192---96796949130.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/uibd1qo23ro87gn66t1ibpnnaj/pigaveduw.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609854ed57880---37884853597.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/92355507740.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/90556946665.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/27229803493.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbf36b32ea---petarekimurenixadokil.pdfIn PDF document text
    • https://isleo.com/i_photos/file/volukusunom.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/32ufntq1gfqfc3sv8k2vor1bnu/86510560792.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/lagifuzetosaxolukon.pdfIn PDF document text
    • http://matras-devison.com/upload/file/59664034100.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/2161315277.pdfIn PDF document text
    • http://nctpa.biz/clients/5/51/51e593b678cc4707ea5ff7b662bcbdb9/File/tugavukezukubosive.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/68448817762.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd19cab339d---konavezewumomumevanug.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705a574bd1d---xumoladitavuposu.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/vovulajipezagave.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/tadn48cdr0j3band3tgg5q4t41/55433871895.pdfIn PDF document text
    • 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_off00010594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10594 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA6 17216 bytes
SHA-256: 4b9ba948545902fea555f4f8ba774420ae1d09d3a7c3c7fbd7273c9e5f08c22c
font_02_sfnt_off00014ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB9 11056 bytes
SHA-256: 8fdc5f9fa8a8b57efa0809551a4c108b7c3a7b71c1015b61e1436d6c145665f7

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