Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd68e7198b6d793b…

MALICIOUS

PDF

69.1 KB Created: 2021-09-24 14:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b070f93fdb409f098680b9f8d9fcc5a9 SHA-1: 895f67722f5b56841a7158489823070671e24373 SHA-256: fd68e7198b6d793b5e6ab6e4c640fbc2061d26ad6549387b9d1426264a1c4046
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of numerous unknown URLs points towards an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://f27szerviz.hu/upload/files/13360705958.pdf In PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/15224581590.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-8/20210908085455902985.pdfIn PDF document text
    • http://beta-rc.com/upload/files/3193113665.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46210998367.pdfIn PDF document text
    • https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/11561069936.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/6324881200.pdfIn PDF document text
    • http://gptools.net/userfiles/file/47925968020.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202109082222075037.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/33925320403.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/bukoraligidemixazepaz.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/dokojawuzivajexudojimo.pdfIn PDF document text
    • http://jujucuisine.com/userfiles/file/pukip.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/27698285375.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/mewofe.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/11000478222.pdfIn PDF document text
    • http://cmi.nfe.go.th/ckfinder/userfiles/files/wimerebufis.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/87707458727.pdfIn PDF document text
    • http://obedovice.cz/userfiles/file/67241810696.pdfIn PDF document text
    • http://tulga.ru/editor/files/xijegewepebos.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/82304617222.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3193ce974---wofalokebejanobavewife.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/034b486c2de959126b77d4009d17b611/xokatuzusenak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+turn+off+recommended+apps+on+androidPDF 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_off0000ad93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD93 15780 bytes
SHA-256: edf2598389c2d06d4dda8964b0786e1ac69d862dc3bae2e3e76f97d93db11d68
font_01_sfnt_off0000d55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 10912 bytes
SHA-256: 98ee718d5d714df21cc3330bc0ae9f8cf6191144904f83d1748964e1660a6cdf