Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1982ed5742bdf2e…

MALICIOUS

PDF

93.2 KB Created: 2021-09-02 08:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5e6eda6c0e146015afee26ddbe020216 SHA-1: 90e0ffb8234d0c304733d9fccb5591182f714a88 SHA-256: f1982ed5742bdf2e9106d0c947e92f7744c6afff0c5fa668bb4c88b752dcd6c8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to PDF files hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or download of malicious payloads, contributing to the overall phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=anti+discrimination+meaning PDF link annotation
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/pekomeva.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/4n9etvoha0lgfmtkj8n0g9q3rm/tisaxi.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6jhsap2c8f8gce39gplr9qral2/lawawosubibuva.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/10428755152.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03a3f47489---gezupafoveti.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/40e6d1c47f0b49152730b9b7a21e4d47/lupiren.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4112fdec7c---xolor.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607847cc87050---fipebuvowezo.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/6e0458bac70ef2255c10449bde7f8373/jafaw.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607bceba5d637---feriwunasisavutopadenu.pdfIn PDF document text
    • https://red-adlay.com/upload/files/mulilujizitejateni.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/rrdq5mbe5oros5o8c9me6dck8v/14842238442.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/18781101742.pdfIn PDF document text
    • http://scro.ru/pic/file/rujusiru.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/1759557929.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/65632580563.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904c54c2a20---dedawerov.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/28644780172.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/c732d21e7c83ebd20b6399dda1111828/27944463238.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/76850869164.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/c97c7ed3ef2b626c54b4575ed86aa490/jajuzitilabexa.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161215e9965778---toregejobewuxovuvulik.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_off00010233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4A 10648 bytes
SHA-256: 433cdf1526389d09a111eea96cef84c6dada9bcc763130f3bf65847ebac1bbea
font_02_sfnt_off0001327a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327A 19212 bytes
SHA-256: 415ed21fa033706d07c1fdd174dc40bc294a2705a369ab7000e22c2bdc93543e

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