Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb8c0991b99c216…

MALICIOUS

PDF

76.0 KB Created: 2021-08-04 01:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32b325af05f1bcbc236375fc8af3b94d SHA-1: f6b48fc0d625ac34ef36c86bef0eaeea14cd24c7 SHA-256: 3eb8c0991b99c21691409de964d3827b138aed400e86a82fe8ab449c8a1d5bfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=jefferson+county+alabama+inmate+mugshots PDF link annotation
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/u80ork3evheo0mte5dtq09m2gr/80430173046.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/lelixaxafakadater.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/ledipu.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960c339478f---2671998363.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/69605952468.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d468a8578---48921466653.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752af6655a0---ligulijivifunovol.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/dc1bbd33ea6bd0788cdfc2640f7faefb/vowigux.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4a6a6a517---gogoviwobomozamekijato.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/e27e84989323a729ce4110a48253f8e7/jibelotob.pdfIn PDF document text
    • https://kaisar168.com/contents//files/mevenajeniwenolikis.pdfIn PDF document text
    • http://didula.com/img/file/41602920854.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210715_225440.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/32772316284.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/tgmfpcm1su9aiejusv3dv9961p/dotesoxepipotatazub.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/68804402388.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/67117375851.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c773f5bfcef---vagodutufifasedeso.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/gidoluposatulojaruzageka.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/baputiwuwe.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8ef50d4e7---70508002647.pdfIn PDF document text
    • https://coatielectronica.com/files/gasofesogusumopopilusugu.pdfIn PDF document text
    • https://amblamy.ee/upload/file/75648857046.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/wipuxijetuzoluxow.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_off0000c561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC561 11128 bytes
SHA-256: 22f22c9e43b7a6055f78b6a647b31187f06fe78c3fcd1977082128c9cea64b25
font_01_sfnt_off0000df3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3A 16188 bytes
SHA-256: c8cfe5a4ad99f61f46c3389d56c9bc98a9ddf4a705b99f8038b52c333dfa1f04
font_02_sfnt_off00010931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10931 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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