Malicious PDF — malware analysis report

Static analysis result for SHA-256 748e192d8d7f1765…

MALICIOUS

PDF

70.3 KB Created: 2021-08-28 01:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 05f557a9a2bfc1428457420d7868bb7f SHA-1: 917926b5e4f569756b1238b617ea3e2907a700ea SHA-256: 748e192d8d7f17657b0d6a1cf1195b88ee5e040f0be094417b7cccf5c8a1726f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • 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://garglob.ru/uplcv?utm_term=best+happy+birthday+wishes+for+son PDF link annotation
    • http://rafaelstore.ru/upload/files/verurogatipowipu.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/73954292102.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/b5856bca5fd1649d427635cdea36e2cc/12727456486.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/60481206486.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e4b033918---motolinilikenaguran.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37545290661.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612952a9301b8---temidava.pdfIn PDF document text
    • http://zuche0551.com/upload/file/9717110583.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/guwujapumesuzix.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a53a60aec---dapikomajuteluboveg.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123b57e100a0---gifibo.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles//file/fotolu.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/bufulafus.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/82774223369.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a178ca76f86---tivabexesafamokuzovazebi.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f94472e7b5---nokuzekaxusabefor.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/nadukorugilunidani.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/k0fgp53guf87dr4ud2fekqj2vv/85979040542.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/62615220689.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/72299460848.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b232f6e785c---42907352033.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_off0000b33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB55 10944 bytes
SHA-256: e18adc5bf9dff72730cdd7d34bdac043de74231e6d9b7943df5320fcc811fc61
font_02_sfnt_off0000e489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE489 14996 bytes
SHA-256: 60040a3c07ab18ed3c5f3230090f848755f00ff3305c239db774e5cb98ee4e76

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