Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebbe2e4e937a00e…

MALICIOUS

PDF

70.2 KB Created: 2021-09-15 19:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f207f7e266a56fa6d53b86d9dbf4462 SHA-1: 2c3af7935e768c5b6ae15576215046a904024b86 SHA-256: 9ebbe2e4e937a00ee8ef1a36084e2aa975ebef5b60a2d74f6cd4fc2486ec8e04
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous embedded URLs pointing to other PDF files. The primary attack pattern involves directing users to these external links, which likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139a373c77b7---45393611867.pdf In PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/rozitexikijuzojepeguguv.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/10944754552.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/74300331476.pdfIn PDF document text
    • https://satesayap.com/contents/files/zitoripevotebutuvero.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/xiriwapum.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/84654568758.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/32880648479.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/vowegimafumoroke.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/20345799998.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/52279275410.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/dumatorifikasowesiwiler.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/joguxafu.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/daxadupubakativabub.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/luditalepexafexofu.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/33940769411.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109091011211369.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/80045799810.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16131f231432f7---vukon.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/pelebofidigavisotevego.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/dexopikaruxitimusuf.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/67336763068.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=votos+de+amor+pdfPDF 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_off0000b042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB042 10384 bytes
SHA-256: 1c3fbaabe2f5352ed2bac4c25764a117a97be24152e7eedc3a9eae6b844bb85f
font_01_sfnt_off0000c7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C8 16776 bytes
SHA-256: 4d238e69d2f3b9314ed9d26d1ff76a953c33b5ed125334c0baf1d86e00fbddb4
font_02_sfnt_off0000f236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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