Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0f9966c4c99b0b…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 12:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 58eb4eaf47ee336327f746ea75651b21 SHA-1: 552c185e0fb0aed67eec2ce49f1e1afb8ccb7755 SHA-256: 2a0f9966c4c99b0b8284539ad2b5624cc9207a226892521ca6be5947ed3ed0bb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, flagged by heuristics, indicates potential for malicious code execution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=assassin%27s+creed+odyssey+obb+file+download+for+android PDF link annotation
    • http://elturo.ru/img/upload/files/99283985386.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/tuzadaduguvazoroveg.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/73580678017.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/12968989720.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/36203900755.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/53554602184.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109060631538151.pdfIn PDF document text
    • https://atavio.ru/files/file/79046431983.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631234839.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/49869801161.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/32562045957.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/89904798246.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/busiruzibozo.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/2fr137hepks19ljoplgtk111vi/89967362973.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/3602440181.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/lomawo.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/15503735314.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393774929f4---71914902202.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/78008778581.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/lemoxatete.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/82074799136.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/jajotidaruxanabazolekufo.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/70921256790.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_off0000dc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 17904 bytes
SHA-256: 87881d310ffcb73a6e0ff6218435fd775f59560c9b0ec12a064202a30d9e48c9
font_02_sfnt_off000122e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E4 10728 bytes
SHA-256: 808cbd422102b67bd6993b51117b529d10676aad949e6d937ef2c711899418bd

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