Malicious PDF — malware analysis report

Static analysis result for SHA-256 4414438ed6110719…

MALICIOUS

PDF

88.8 KB Created: 2021-09-01 23:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fa5dc396ae3ee565e18d5b8ca1ad6994 SHA-1: 3c803833270df5cfe1efe9ce553bc1d42ddb2b34 SHA-256: 4414438ed611071985aafad75b1bc15e52d259c9655f5c17b118319f16bbe038
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://nomylo.ru/uplcv?utm_term=step+brother+and+sister+having+sex PDF link annotation
    • http://wadirumshootingstars.com/userfiles/file///66326819779.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608339d72da1b---31063016200.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/kisore.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/25934420607.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/nafezesoxolenawetirivuf.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/56cq3u69konk8qprnod0tquui0/kasegutunelodudiwotuta.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/69206410186.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/190a238844e45d70259be3d38bfdc1b5/dizenumef.pdfIn PDF document text
    • http://homeopathyhk.com/files/fubexutelijejipubalax.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/22502420745.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/dilelapuzubax.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/pojotituranevusivojov.pdfIn PDF document text
    • http://legalinet.eu./userfiles/files/tabanufuka.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/rexibevelavusujexujunudun.pdfIn PDF document text
    • https://grancom.by/upload/docs/10164214069.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/73f5f5cc6b7b60617dcb7e0c3418fddd/40563598377.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aac9f544206---94386722019.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/puxapoferat.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/tebalofuwuluxozunob.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/kegipanasibaridotavikoved.pdfIn PDF document text
    • http://bjjiffy.com/upload/vegujugotapubapagomuwidi.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f3be6e261---tajotiwaleposogo.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/08dff24b5d6c5709674143daebbfca45/medumekaguwesunutize.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/95101128524.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/gavinolevilazafofilimako.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/54081480897.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a19d113dab6---dobixezigoj.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/joxuzuge.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_off0000f53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4C 17956 bytes
SHA-256: 5e357806a0b7642a8a88db888b4d75728360eece30b6aaf0a3ba943dac425529
font_02_sfnt_off00013bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB6 11008 bytes
SHA-256: ba33f69e924f52b66a88fdf0cefb327d2dcba973afd7cf557b305682b4fb606e