Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f3ecff14795a92…

MALICIOUS

PDF

81.2 KB Created: 2021-09-22 14:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 55295e226bf3b1efa174bcd7cf832a90 SHA-1: 4c8ca3a34b42d68dfa8394c570e9e5b971a83d79 SHA-256: 35f3ecff14795a92cb62f06bac4df5acaa3c9d0964a82017e830b0b3bcd730ef
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URLs, some of which point to compromised websites or link farms. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software, a common social engineering tactic. The embedded JavaScript likely facilitates the execution of malicious code or the download of further payloads, contributing to the overall phishing and potential malware delivery objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pixomot.ru/uplcv?utm_term=pokemon+go+spoofing+android+10 PDF link annotation
    • https://kmedebiyatgunleri.com/ckfinder/userfiles/files/71533433113.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/sifalesububuzavitop.pdfIn PDF document text
    • http://cabini.it/userfiles/files/64460458942.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/58458854027.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/susuzadizawuxofagude.pdfIn PDF document text
    • http://royalgroup.at/tmp/24714090250.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/80583928222.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/87426342623.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/nizajiserigexunuxa.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/lijaxirugewivose.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/devimupupegize.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161416cf78c541---14240425573.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/t3g2ggebqgcbibod74o3rffcp1/37856257679.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/6441516481.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161455eebd5f3d---32732129569.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109100616063873.pdfIn PDF document text
    • https://highrise.pl/file/wimofixozinewin.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/98552975859.pdfIn PDF document text
    • http://www.pvvc.cz/files/jogex.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/pukujavelimexowipulipus.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/ziwokiwixojamo.pdfIn PDF document text
    • http://willbramephotography.com/lakopu.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_off0000d93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 10964 bytes
SHA-256: bcf44cafd32ff13fdc2c74d5c5d74d7d7a764d98d2c3576df2bd51e30ea77e87
font_02_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 17324 bytes
SHA-256: cc274da5a2de125ac47a99f73b98ffdd914af7d37c04170fce260f44aeaabf44

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