Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce56dfac64b52a7…

MALICIOUS

PDF

78.1 KB Created: 2021-09-23 22:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1e21546d85f9c929a91975a94661c013 SHA-1: c1c72e9f22d774b582e8b41b3f7af6b55ba5112e SHA-256: 9ce56dfac64b52a7f183f8a13be5a3031a6fb56b793ec32facb54b3ed1fb3d6b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to suspicious domains and identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://asvpp.fr/pdf/sakofuregozuramof.pdf In PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/kapagegusod.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16135de0406593---xuzewibuseboxidalexuram.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/xobis.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/vamekoxefenag.pdfIn PDF document text
    • https://securitydm.com/slicice/file/jumolulamovaban.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/fdefac496bb626b21533e8f5a5cdf39c/24394786689.pdfIn PDF document text
    • https://datawire.gr/files/files/javojasunise.pdfIn PDF document text
    • http://debrecen.varosom.hu/userfiles/files/87866556647.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021091601553046.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/timowujubalawudagibevan.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/19876898819.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/pomefunemukan.pdfIn PDF document text
    • https://unaizahic.com/Files/files/728430369.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/88744415028.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/jolimezowaron.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/31248960986.pdfIn PDF document text
    • http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
    • http://wawabed.pl/uploads/userfiles/file/viver.pdfIn PDF document text
    • http://ndt-ultratech.com/files/nisodivimuf.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/kudepabuzajudu.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/55204319019.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/84966600128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=moonlight+sonata+viola+sheet+musicPDF 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_off0000cdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 17244 bytes
SHA-256: b71e04c37e92c38fb7b3dc698663920e9ce4c0feafcd4ae9352660e2e2487fb4
font_02_sfnt_off000112c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 10736 bytes
SHA-256: 9f1f695b761f8e147eac69ff619e06742c179a678fa6ebc4f01e7247441354a5

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