Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebf46a0cd311327…

MALICIOUS

PDF

85.8 KB Created: 2021-09-09 22:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b28fa71a5858ce42ea4af603b88c10ff SHA-1: 81cbe40cf24383ca8a6295c8d542cf557abdfcb8 SHA-256: 0ebf46a0cd3113279d98bdc53213f0044f91f7aae6fa0c831815c2523847547d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated maliciousness. It contains numerous embedded URLs, with a heuristic identifying it as a link farm on disposable hosting. While no scripts were directly extracted, the presence of external URIs and the link farm nature suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • 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.
  • 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://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/45951097352.pdf In PDF document text
    • http://autosklo.sk/pictures/file/71943309535.pdfIn PDF document text
    • https://elemonbg.com/Files/File/10604277866.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/75313829116.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/taxexi.pdfIn PDF document text
    • http://biosite.ru/images/news/file/fesuvo.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/ruxibivonemagolik.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/10917209728.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/sabelatozovizusuwamokobu.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/20117859582.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/guvuposofagobikuzuz.pdfIn PDF document text
    • http://demo755.webbazaar.com/uploads/rexofejuf.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ac8e61f0f35138dae3ba0f377f93410e/67842017646.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/81039891388.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10324591039.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/rafafijazon.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/sasip.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/movixaxukuzilixu.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4c7a9de1d---sixasenas.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10030820222.pdfIn PDF document text
    • http://jumpstart.mobi/userfiles/file/67517344279.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/46825824881.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/55010428932.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/66678669325.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/37114444202.pdfIn PDF document text
    • http://suranareecommand.net/UserFiles/File/lilutiwapufol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=website+for+free+v+bucksPDF 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_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 19136 bytes
SHA-256: 3c568dd194ee70dcf6c1f2316506adbb7d4d993b6d14971aaff5ecc01144f58d
font_02_sfnt_off00013157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13157 10408 bytes
SHA-256: 7b7297e28fb8d209b59464a664d588c4a00ed6e3753250cfd54b9a36e1641e51