Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69f1327969b2eb8…

MALICIOUS

PDF

75.2 KB Created: 2021-09-05 01:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 20f82a3fa95f17d272812670318fa5cc SHA-1: be0e6e6b9dfad4289998f78d0cb0010cd06d6a65 SHA-256: e69f1327969b2eb8300c167b6132a06e456c19bbdfc9decc29a2b6080d7a2352
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised WordPress upload directories and disposable hosting. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious or phishing sites, potentially as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088895ef3a61---jugifibinifuxixaforipori.pdf In PDF document text
    • http://jjkxmy.com/upload/files/202108240841205826.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb4f19aa94---pazolimipigofalawelaloxe.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/setelovew.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/lokapatot.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/vokijebetamibezetoxumi.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ac51ef16---nowokunizo.pdfIn PDF document text
    • http://digifast.cz/userfiles/razudow.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/jafiwi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084645245724---vevuzip.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/83880413310.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/64228781635.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/66517002074.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/busunubewezegexesopix.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/39042939947.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/44962401241.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/bekij.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/zuxowuvuzidebe.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/oeq32q40v8lm4420gjpffhd6u8/zunigisata.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/7af7b1d3321f2068c562cddc0281201d/40540447383.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a90e496181a---51079683122.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/4bbe1e555be7a3442678af0126c1d733/72834077699.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eee224b8b6---93227855292.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/p9itcvvuc1gq1ch5280knunvt2/nupukexidunajafademuxu.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210821034235.pdfIn PDF document text
    • http://midel.me/userfiles/file/vetinotamizodumes.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a65b5712e8---5314194853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=savage+110+ba+stealth+338+lapua+manualPDF 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_off0000c0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F1 16780 bytes
SHA-256: 63189b67c29fd084f864c679608948fdb48e082064bf06833ee1abf7c1fab698
font_01_sfnt_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 11324 bytes
SHA-256: aec2547822869ae6e878b625c73b4ae6effd3af845bb17da04db7cd64ba046a7
font_02_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1