Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e24a19a92ac641…

MALICIOUS

PDF

69.4 KB Created: 2021-10-04 06:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5e053b932be412fedf4327e5289dfa5a SHA-1: c4e884ff6bb37a42c2938ae0dd5312e93f61405f SHA-256: d1e24a19a92ac6417fe470998852dabb2b9ac551fda546befe16cc90889e1492
146 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The PDF_IMAGE_LURE heuristic indicates it's an image-based document designed to trick users into clicking an embedded link, which is confirmed by the presence of numerous external URIs. The document body is heavily obfuscated, preventing analysis of its direct content, but the heuristics and URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://irlanc.ru/uplcv?utm_term=watch+parasite+online+english+subtitles+123movies PDF link annotation
    • http://gu-bo.cn/uploads/files/tiwovadeja.pdfIn PDF document text
    • http://sergeybazarov.ru/file/telawakunivop.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/dozasevu.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/safubexenafidupawiv.pdfIn PDF document text
    • http://com123.vn/uploads/file/97743211701.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/84335750203.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210917192711.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210922041201.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/74100961335.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/xogufezi.pdfIn PDF document text
    • http://sro52.ru/uploads/files/1360529579.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/gedema.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/14878294283.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210910_101829.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/befotizusade.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/52600901433.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/vosuzekelatafekizekanerof.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/fadixuket.pdfIn PDF document text
    • http://geodez.com/pliki/file/zanadalodujemi.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/91873803815.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/mowawuz.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155c7df3ff03---87428917649.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/meriremobiteb.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6eeb44ada3626825d0d7c6c1ea2981bf/37036165113.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/kufolexofabogusejos.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/duletusojitubedifu.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_off0000b0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C4 13728 bytes
SHA-256: 800866159fb7ef8ba2412d788ab68fca2038b29b72d8fe0b77347a51fd813fdf
font_02_sfnt_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 11464 bytes
SHA-256: bbb5acc1058d4dec5866e03270ce19f2bdaa217893c695b7b80c176866b53778