Malicious PDF — malware analysis report

Static analysis result for SHA-256 295ee67485d369f2…

MALICIOUS

PDF

78.5 KB Created: 2021-09-20 17:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6c3abca8150b7c4687cd4c520080ffec SHA-1: 2eef76559fcd710d8aac7495b6cbb443e32ccfed SHA-256: 295ee67485d369f240fe8d0938de24df317d1d4c9dbb6328b63ccc9e48b98216
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs, as suggested by the PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, which point to a link farm structure designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://paitoonbox.com/userfiles/files/danixojogowirovupuruxo.pdf In PDF document text
    • http://daiwavn.com/uploads/image/files/bisimevurobiloxosowo.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/ximovusogidenaj.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/6250526923.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/webuwanirekisawagogiwa.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/43105104509.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/36940571535.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/pigibodu.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/33530984212.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86837061834.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/riwutotipoxitirorive.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/31652231981.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/56983085296.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/26436973087.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/65934858250.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/xurifodokonuriwolizo.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/660070b07d2a14bc3fd542984db93a53/21363140091.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/30870932740.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/91233097247.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16140966cc38d8---27675773773.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/kekiperabigedonijuxo.pdfIn PDF document text
    • http://azs-szermierka.pl/zdjecia/fck/file/tilozorajawodemexo.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/93721513533.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/99106244481.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202199205499901.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=telephone+directory+perth+waPDF 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_off0000d002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE819 10604 bytes
SHA-256: 1a07e13094a1a2b6c6ec64430b2faba4ebcfcdf6ca5fac7c0cccf2675a25c62a
font_02_sfnt_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 16756 bytes
SHA-256: 5ca0defaa643ba6a0cc9a5b7fb856f3229a4cf5b681c3bde4fa0c9af87de1ea5