Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe29862a9b19f19…

MALICIOUS

PDF

80.4 KB Created: 2021-09-21 16:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4092461069fb4d7cd3d1870d18c855da SHA-1: da36ed778ca58086404b9416a93473effecf5e4a SHA-256: cbe29862a9b19f197e34d126c58d07fd5f3a80cacedda0ac1213c7afd99b1699
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it acts as a lure to redirect users to potentially harmful websites. The PDF structure and embedded links are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=how+to+print+labels+from+pdf PDF link annotation
    • https://ip-pharma.net/data/files/walesu.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210913_F660BBDA6A928F57.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/movapi.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/24414687351.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/72525739342.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/rafaduvimeperida.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bd8ca06ea---53004131865.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/65830162352.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/butafuriz.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/33954230566.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/kugitetufe.pdfIn PDF document text
    • https://migger.dk/userimages/file/bojexute.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/ketuxiluwobizuvarip.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/gegaziketutad.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/55735579599.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/jazesaviwufavenurafetoro.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/zesujorubavokenugi.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161371885eafe6---leguvikatenavodezidibimed.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/23264803036.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/24258639568.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/3978119839.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/zojudaxapuzi.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/29462220887.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_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 10876 bytes
SHA-256: 1ea7fca82e395072561c67a03837ce562a4d5199834098e40a05d8b39edfeae1
font_01_sfnt_off0000ef81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 17256 bytes
SHA-256: 02453a727b20059b18a0a390add1cefa3867fb8ca03679431aac18699c23cc26
font_02_sfnt_off00011bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1