Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee287b6d1befadfc…

MALICIOUS

PDF

73.3 KB Created: 2021-09-26 19:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3d137735bb32fd6fb6474f29379a80cb SHA-1: 7f7b2c035f93aa5107ed21e8b9e7239401d1bdcf SHA-256: ee287b6d1befadfc19e2699dc3a74d6f8530d14e934a42b12fffcc5fc7613b97
126 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://huntic.ru/uplcv?utm_term=descargar+android+para+celular+alcatel PDF link annotation
    • http://www.golfusa.be/userfiles/files/43091395149.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/7430487348.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/tidajutemonavugaripawap.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/15354523552.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/20677258467.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/43005394152.pdfIn PDF document text
    • http://artospace.com/pics/file/58651881837.pdfIn PDF document text
    • http://atya.eu/files/file/ketuxakozinu.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/poviritorakup.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/58581705390.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/15057362728.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/88128034011.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210926060746.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/35791632944.pdfIn PDF document text
    • http://dakmet.pl/upload/busonu.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/91444926383.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/xejifiditalubonisuv.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/kifoj.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614966cfb963d---46808440613.pdfIn PDF document text
    • http://logicamail.it/draft/media/mebupaponuvufuxuwixipuvup.pdfIn PDF document text
    • http://webhoctot.com/app/webroot/uploads/files/xadarozisavajojuwonobi.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393d0d283b6---getenekukedugaso.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_off0000b5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5B6 10788 bytes
SHA-256: ac572a9f1c04809b886047555dbe142dd84e4ad9580ae3286c59ab978165d76b
font_01_sfnt_off0000ce7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7B 18848 bytes
SHA-256: 51845c53256811dd22487f47b3bc6e91180442dbb795507842bdbcd68548c52d
font_02_sfnt_off0000ff77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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