Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcee8802fd6a8dd…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 06:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a01fcc20a7f308fc7e13c248fb9ebbb3 SHA-1: f0e17f653416c34380bb82cf2a60a6346ba31e5d SHA-256: 5fcee8802fd6a8dd6e35ebb9f1f7153a3c5550d83bf3cdb16cb6177655468705
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, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. The document body is unreadable, but the presence of many external links suggests a redirection attempt to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a60d5582cd5---noreguvozajobelaxukod.pdf In PDF document text
    • http://chi-kara.net/userfiles/file/zonasizipu.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/kovanaj.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/zutozurarotuzofavijusam.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d92c380c7d---99627733843.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/wovemefamob.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/mujitenawofuw.pdfIn PDF document text
    • http://centrons.com/uploaded/file/2022232630611e3dc10163a.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/945395a719433f672ed67ab847ee590b/82625851073.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/800905ca8f8dc87c070e314613447ff3/jidamizife.pdfIn PDF document text
    • http://firegallery.ru/img/upload/36770734010.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e92c80bc8c1---tugizaranafavuzopanerodu.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/bisibexitab.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160788d65e56dd---jaworudidakuxomojisozime.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609090ce73495---34998836319.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dc2d46a9d39---69845120446.pdfIn PDF document text
    • http://beijingteye.com/upload/files/domogaboxazutisofin.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202108212342311423.pdfIn PDF document text
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/ziketajukosojosapesod.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/91139304085.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/zezasabebemazopiz.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/7eb76811e18acd8e153c7eb764368c7d/50656316093.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609402f6630b3---navilepidojalavunaz.pdfIn PDF document text
    • http://agrion.org/upload/fichier/629696536.pdfIn PDF document text
    • http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/94370611717.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/xomukopomizuge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=first+turn+steakhousePDF 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_off0000dd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 10328 bytes
SHA-256: 59b50d5c7db4bcaece3a695ffe210b8a7b0590baa39af7785cd56c9f98828806
font_01_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 18380 bytes
SHA-256: de27b12121a84220b574a07d26d17f8e365903b70d28dab9209a96267749adf5
font_02_sfnt_off000123e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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