Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e35db6f22f6a14…

MALICIOUS

PDF

82.4 KB Created: 2021-09-19 13:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5bf017c057f19a9498c4fd7af97c5b1f SHA-1: cb8c0fb0d56a6799cc3e09ce4c4d65ccf34af656 SHA-256: 93e35db6f22f6a149194a700f2ddb48c34f5e77afb30c623751346bd922071d0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://crysiq.ru/uplcv?utm_term=fifa+21+obb+and+apk PDF link annotation
    • http://mdsalon.ru/img/lib/file/15461046208.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/83378610066.pdfIn PDF document text
    • http://roocenter.ru/upload/file/93616190172.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/89428454081.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/13305143124.pdfIn PDF document text
    • http://terminsk.by/pics/files/16073663738.pdfIn PDF document text
    • http://cistenivytahu.cz/upload/file/12886275722.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/zigapifis.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/kikizunilotetuwuk.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/86485002892.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/vibasilijutavatumaxi.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210914051829.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/dedib.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/10804390643.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/95266102086.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/kizuzezaxuvibaxin.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/77482609306.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/25466974111.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/73575241439.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133b6e4ded6f---65563834145.pdfIn PDF document text
    • http://tcihk.com/userfiles/fagorenaguzazo.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133acef912aa---jugizi.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_off0000dc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 19032 bytes
SHA-256: 67c6256063891615d7024d073f89a568977df057f8c482d7e813e7b5da4c830d
font_02_sfnt_off00012530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12530 10328 bytes
SHA-256: 845e659d1b5769600526fe7b37847eb925b01f598ff23bfea2e4fc94d77c629f

Open this report in the interactive analyzer, or submit your own file for analysis.