Malicious PDF — malware analysis report

Static analysis result for SHA-256 d591b777fc47e173…

MALICIOUS

PDF

71.0 KB Created: 2021-09-24 20:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8e4b8005e78fe87cbbed84c0f218a368 SHA-1: e03e4ee8723eec0a742d68ad0f259b6cfe76c5f7 SHA-256: d591b777fc47e1730ea95562b9b892866692ba7ee3bfbdde18197fcb7bfe09bc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of JavaScript points to T1059.007, and the nature of the file suggests it's delivered as an attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/74021711622.pdf In PDF document text
    • http://dmychadla.eu/UserFiles/File/janozanuduzodafomeg.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/ligasokezuvizenipafuwilo.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/93073245892.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/15658845108.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/17665728667.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/rojavufisafasikeped.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/27340836697.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/zurunigive.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/jasatokibakexonufoxagikaj.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/29905332399.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/67343023092.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/62042574802.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/4b6cb9beb45c8870d39b590876162e14/bilazovemov.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/rilabatovoliboritadepap.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/71690421211.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/41514007582.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/76095113122.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/83829259826.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/vabevepivowuvadulewipuv.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/72843924409.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/jejusivokasezijasikusope.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161394e0d113b1---sufevixopiker.pdfIn PDF document text
    • http://gaudi.tw/upload/file/68514834230.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/31914382449.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/jomozufimimeb.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/39427107119.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/pigosolid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=can+you+get+android+apps+on+laptopPDF 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_off0000b752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB752 10812 bytes
SHA-256: 2f66f89cfbf000a1d8d9dd2957a0962a49b9cd6bcf3e19ffe4140d5ea6f47596
font_01_sfnt_off0000d036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 15116 bytes
SHA-256: 33f1102a43a6a187d4609a655ef2d3b5cb7fd5bccb178cc8b1f5a9c8fca117fc
font_02_sfnt_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1