Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2ba40464d2c8a5…

MALICIOUS

PDF

82.0 KB Created: 2021-09-17 22:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 08e22c286530a10bdb0690d66d8ffecc SHA-1: 9f0d1b6ff955ece303d20fb47ef4ef9218a1ee9c SHA-256: 9f2ba40464d2c8a556b1a19f1fa1502d326f8ee5d6e0f118c0ed0a767c141573
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mt-creativestudio.com/ckfinder/userfiles/files/52042164018.pdf In PDF document text
    • http://otvorene-srdce.sk/userfiles/file/tititemizemeletojazar.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/luxumomitutasusolikijefu.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/kawabadimep.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/nanevikuxuwukapi.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/42812598179.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/75381648905.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16130775f4d853---pebux.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/65334484576.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210911010223.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/kvp1eg569mf1h9gaicsevl5jr3/jewufamukekitawoxis.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/govefeno.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/leterunusetetujisodi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc778a575d---17848662248.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/3717820644.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/dukijunerofarodakizuropuv.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/50580692648.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/redof.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109131946039403.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/27557880663.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/53464054070.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/20634532032.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/2f09a5122f6b7cca3c5a7a2529ed1b42/97928861338.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/vefabuzonopites.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=jedi+academy+switch+cheatsPDF 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_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 17108 bytes
SHA-256: 16222dabe85117635eec8d3940e43d027c622bc6276c850dc199ce704467836c
font_01_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A4 10456 bytes
SHA-256: 5901db9a6da2ae6c9eb894eef6d0a3242416a82c521d34d01c38ea5c23e83bbb

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