Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dafbc335d9fa97…

MALICIOUS

PDF

77.8 KB Created: 2021-08-31 06:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c73e18ce13aad29d48467bfea4b8df1a SHA-1: 7c7e3c32888ca5928dc2dab508abdcfdacbbd13f SHA-256: e2dafbc335d9fa97a02ea46c6a62b364c8e4884c8f8a42bffd55eee49c6f32f3
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised websites or disposable domains, suggesting it functions as a link farm to distribute phishing lures or malware. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user clicks for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://irlanc.ru/uplcv?utm_term=knives+out+watch+online+fmovies PDF link annotation
    • https://asthasupermarket.com/userfiles/file/93541613302.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080b71762c94---dofexinab.pdfIn PDF document text
    • https://e-midas.ro/files/file/zazidavuxigafunod.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/164855178.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4fba786b8---riwisalefaleguke.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/48516137438.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/xexepi.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/xotal.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/luwaromuboxunanu.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a503445da7a---gavepigarinabazeju.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/33309286070.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/zagavarijumile.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202108190444185632.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/fa3db2ee1194ccd00d871dc0fa392aaa/gevujijofoxerototekazesux.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/fabivimejunokafar.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/juxowogolawomixabisutepep.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/nesivenajisi.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d05f004799---57327843954.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66cad2eb0---kupalizepebitavigosomipa.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/sewilaxalanipabarovu.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/84154457330.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/aad67d2779fbf58bd3af7bfdc3f58687/7229093074.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/8cca9fa90b903573f98866bb32f9b566/wuzaju.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/83378718280.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_off0000cb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB60 17348 bytes
SHA-256: 0250b9e7c0bd952154de3cd2fc56dcf108f2e1175fdb3f167cb22205375710fa
font_01_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11063 10744 bytes
SHA-256: 7d72609efb84bfb21a8956e2de48f3699aef2a1f59f90770c4e54a2998428250

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