Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdf58b2f6c6e10a…

MALICIOUS

PDF

146.1 KB Created: 2021-06-30 19:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8574bc076192c4eae66ba370b030f95f SHA-1: bf3d59a029f7c0105c2ae6c5b6eef74f3362b668 SHA-256: 5bdf58b2f6c6e10ae446fcf3e487c11bf865a62e6fc825f411e6dfc5281ab991
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and points to compromised CMS uploads, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://crysiq.ru/uplcv?utm_term=malcolm+x+justice+quote PDF link annotation
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/efd25e2b81f3c5ca4568281cb166388e/rifinijadisedota.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/43840638091.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/demosepuvemejuxawod.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/tg0a2fas3181saf87q1kf989t4/vofitutiwiregimowita.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/10099263475.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c25fca48a11---redixoveko.pdfIn PDF document text
    • http://anpo.vn/upload/files/paxasobufi.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e613a88847---vuxarazilafupu.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/62007311347.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4ac2b1c1c---sutodek.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/kusomejidawaxa.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/7ffa493a465ef9ca3427f42c4a77d2d0/xewakumetevuxazavako.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160846875d652e---vetamejujedosuvebowifer.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/39f6c17c55568ad579561a2d213d802c/pexaxanegaziporefuf.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/baviliv.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/duvaxajosovapewodebofatew.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/8tshckmoi3kqto3i3j9k96noh2/64983456332.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d41eccdb09d---fanosekuweluzesosobeferam.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/cf5c0108a8ec535ef7a99deb7090b7d3/fewokefoxat.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/13933857532.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075454b9ab9f---pojabalubugise.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_off0001dbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBFB 17832 bytes
SHA-256: 7270f05efe75207f8602b484dd16c5ad0bf64090407a75aec8374800fdd41d1c
font_01_sfnt_off00020a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A9A 10660 bytes
SHA-256: 98cef7ae2f96aa8bd4e3d2ed3214290e5ae478bd07b91471813d0808426434f6
font_02_sfnt_off00022318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22318 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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