Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ae9aee407cb059…

MALICIOUS

PDF

88.3 KB Created: 2021-07-23 14:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8a2ad3c685fd418fdb6271e9ab2e03a SHA-1: d2b49b8c1b8f3499e8ab020013f97de360437218 SHA-256: 26ae9aee407cb059f238cfaf0f66421fe76af78d41e73136f5f4087ccf945701
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The presence of numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, indicates a link farm designed to redirect users. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://thaoduocvn.com/userfiles/image/file/rixivulepixojujiza.pdf In PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/42733167880.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/763df7910cf78e3d7c9715a8a92eeef7/zobikamevetiru.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/2qo70moa34sh7gip9v99ij6l73/21897235570.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/laninaforijozab.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608fb4329f182---64081773925.pdfIn PDF document text
    • http://euro520.net/userfiles/file/162143815817365145.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/titaduwusok.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/c1384e2a709f44559e5614dffd7b4af5/51969328039.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c12271b53dc---16284060831.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b58bba4654---47653541445.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/q8sqge93s165qoci04bsj0rist/39373580089.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f23547f5a0e2ed20a34baa8605530fcb/pafifixugofujafugixax.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f5f6437b0e8---65705244341.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/63462313733.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608715701beaf---sonedegagatufarif.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/vapakotijitugegowafesef.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3768f0d60c---32372126000.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/kirajiwazogarujozig.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/12905641073.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/69613111790.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/70484221283.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/5bmuodk72f0bpr8vghrvs9198m/20378904019.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/96194622518.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606edc225f6a6---limek.pdfIn PDF document text
    • http://clinicoral.com/img/userfiles/files/28186682628.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/ipq37n6l0f1nbted5ttv1sse65/wolivubatosomepetapob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=fiches+p%C3%A9dagogiques+de+fran%C3%A7ais+primaire+pdfPDF 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_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 11496 bytes
SHA-256: 892e23b0777ac14fefd2de325f7c2db6a3e529419fc37da169257ccd81864390
font_02_sfnt_off00012029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12029 19520 bytes
SHA-256: 273bd4e100108f57e3844e7d48041860b1e27bf93f2e0a08d562bdc6785e9126

Open this report in the interactive analyzer, or submit your own file for analysis.