Malicious PDF — malware analysis report

Static analysis result for SHA-256 06528c89c484568f…

MALICIOUS

PDF

69.5 KB Created: 2021-09-26 09:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b6acc6c2000b5c740ab9f8e9254d8cb1 SHA-1: f63d0fc0b9b0ef1a9fd50daa5fd43aa4d5d39d58 SHA-256: 06528c89c484568fdc1ce2b3741b968ce4c7f11acb6c78cbe17cbf620506d663
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially disposable hosts, suggesting an attempt to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

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 http://kingsfinancialconsulting.com/userfiles/file/33886929378.pdf In PDF document text
    • http://kraemer-duennebacke.de/files/file/65673448241.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/padasitafogilafej.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/53250872580.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/zemasukotudomefetelagos.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/lumofunemabudavoku.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/podifadasi.pdfIn PDF document text
    • https://parkettworld.com/upload/files/2763287764.pdfIn PDF document text
    • http://seattledesis.com/fckeditor/file/xabotesamagudosuvuxizaxuk.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/77719039601.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/27737740277.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/pimaruvefirumil.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/16653925292.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89811641143.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/limirizebiloli.pdfIn PDF document text
    • https://cityface.cz/res/file/mirukexevotazisoge.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/viwesedidifuso.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16142525eb61e6---gupugasaxi.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/75a2fa91976d4a9f77002d34b042b5eb/74409895532.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/xepodewafatakikedi.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/46253436704.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/29828497956.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/60585588972.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614110035e798---15800101481.pdfIn PDF document text
    • http://floralojistik.com/userfiles/file/bovazebumu.pdfIn PDF document text
    • http://web5gstore.com/Files/files/kadabekukorifijowom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=eventbus+in+androidPDF 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_off0000b195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB195 10484 bytes
SHA-256: 74208607414daa3a087856b6a91f1c1ed2fe22bfc91d736be19acbd9738e0c55
font_01_sfnt_off0000c98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 15476 bytes
SHA-256: 6da1342420fb2220a63d1acb7d0b3bb4748e5808f18c306325e48cd3e23e71c8