Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9952989477f263…

MALICIOUS

PDF

69.4 KB Created: 2021-09-24 22:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3890667ebfa9faef4ed13a9c9ca77592 SHA-1: 02f96c73070eb2077f241ae0c9adf035a1c6a765 SHA-256: 4d9952989477f263fc20f8df63fa9c35fa98ce7a079dc5b766deed324bc2b76d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content or redirecting users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely attempts to download and execute a second-stage payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • 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 https://luckysurface.itweald.com/uploads/files/614b9b4f6ae82.pdf In PDF document text
    • http://labuchedeberce.fr/userfiles/file/tigofesunelofarusefabewan.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/38416445756.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/85939441606.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/32083841817.pdfIn PDF document text
    • https://sanidom.pl/img/file/muzopekobubug.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/56136edcfbfb0d3586b6d1b79b77a3a9/gejafomiwux.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/papurujexarawato.pdfIn PDF document text
    • http://leton.pl/userfiles/file/fatax.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/miben.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/mivupajikifolanogotugi.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16141a620e4cb2---lojerusijejanijenoja.pdfIn PDF document text
    • http://lyshiying.com/d/files/naxuwosomojatup.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/ketafo.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/sukemuvovar.pdfIn PDF document text
    • http://lgassociates.in/uploads/jusunimekaveme.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/sojavowufazaparevekava.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/77225484469.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/64604671075.pdfIn PDF document text
    • https://senegal4d.com/contents/files/vawusezopo.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/59725900379.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/57331204331.pdfIn PDF document text
    • https://pixel.bg/img/file/96910125750.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/74339552462.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/wosabiberuvesabuzikoviz.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/vedejebarig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=bard+of+blood+online+watchPDF 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_off0000b121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB121 10684 bytes
SHA-256: f4e004801ebd759fc0c7c38267c122fec3a2a6621584eb8d7a597d2e7a752708
font_01_sfnt_off0000c994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC994 15160 bytes
SHA-256: e93eec7f5ca8edc27ad5624ee7aeb8d18218a98f4d910b6e674338da5d3748e1
font_02_sfnt_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1