Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca1e3bb6430ac52…

MALICIOUS

PDF

81.8 KB Created: 2021-09-22 09:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 35c7ae66d12726048310408e16aeb65c SHA-1: 957908537da206c90a28bef1540ab851d30dd017 SHA-256: 8ca1e3bb6430ac52c1921e852414c22d91cedfca31b366e62b66da14b6be1ba7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=porn+application+for+android PDF link annotation
    • https://sheenabusesandcoaches.com/userfiles/file/gusizinadogikijanokokem.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/89733795989.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/11126224048.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/wimano.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/6598237582.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5b2698ddd95e1d3908ae53813e8dea9/97144804291.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/rutupezilak.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/lokuzixi.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109020513047386.pdfIn PDF document text
    • http://dlzj.net/upload/files/2021091519195979797.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/d20e8f800a6503cef8c7bd62a43b69af/boxuruvusodewa.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/57702925093.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/nododedukotux.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/faserawulusuve.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/ponovisalajef.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/goziditadobizukatajedos.pdfIn PDF document text
    • http://checopharma.com/upload/files/11810823843.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/nukesewe.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/jijaxoji.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/juxamozilenoxufubemavez.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_off0000da41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 10316 bytes
SHA-256: b8337254796258ee1c5b12b5feaf3d2635cc8435dffcb892d7b82fdb31f7f0a1
font_01_sfnt_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 18740 bytes
SHA-256: b8456a1b18df5e9c43c8e510fca603169a8c67c74c1c4b294f5afa924abe51de
font_02_sfnt_off000121bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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