Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fe0ecd59bd8b15…

MALICIOUS

PDF

80.5 KB Created: 2021-09-19 09:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d6a4fc30379cef4c6c06deeede22a026 SHA-1: c249f132cf81abb3958d7522b17a18980cc4aa72 SHA-256: 74fe0ecd59bd8b1582d8fb954aca9161964d5eef852007f1d7044f5907228c4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://infrive.ru/uplcv?utm_term=metodos+de+pronosticos+cuantitativos+pdf PDF link annotation
    • http://backkwang.com/userData/board/file/gumidupovipilanaje.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/dadf52884793633b659863d72be02036/36988981228.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/fubewekibane.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16139aca71569f---wiwigajovos.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/deruvogam.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/jokiwifux.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/jawixejudumitalovabixupep.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/rimaxozop.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/f3df4685378755cfe67bea12554392b3/52845847369.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44483541384.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613476e6af080---zonotakawinowokafeduw.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/27451936396.pdfIn PDF document text
    • http://sushibelovo.ru/files/porapubopabupaziverago.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16146892f40b54---13382499542.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f74a76b42d---23998195442.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/90289537956.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/65672943365.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/xesigenenakolajemuriwe.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614071b936f5c---rofosetimawa.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/0tp4kpoub73i5ka2pbe01alun1/86992579885.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/gaber.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_off0000d3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B6 10724 bytes
SHA-256: d291435dee042fb2ab6d2bf2c7d19be4bea7c1e7ad41f4ccf20e6c81f7189e44
font_01_sfnt_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 18980 bytes
SHA-256: 0084cdf86c739b47fab5c11edc2431e57826b3ba45b70cadc54e51c5ba2c6ef3
font_02_sfnt_off00011c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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