Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fd75aaf3e97ef6…

MALICIOUS

PDF

70.5 KB Created: 2021-09-26 20:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f9a03218bb2dc7fa59d2126e6b36bc3e SHA-1: 0a49f1498abc810295c7a092bddd11de67eb1b1f SHA-256: f0fd75aaf3e97ef684163bb83b1337e87add195e2716a4c8e0d1e8de75088456
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://panama4d.com/contents/files/bapunebulapinuxorodipopeg.pdf In PDF document text
    • http://choinka4x4.org/cms/files/file/64184831164.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/69282911610.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/161391e66e26f4---94115706803.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/xisit.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/rirididemesalepi.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/tokelewokebulabiwivar.pdfIn PDF document text
    • https://km2804.com/ckupload/files/22570292875.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/81651702755.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/nakumudikujofedizumubo.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202109042107562064.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/wefaxibodugajadir.pdfIn PDF document text
    • http://korytnica.net/data/files/98621168082.pdfIn PDF document text
    • http://webbuilders.com/files/file/4740220994.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/rakozobimoliwup.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210902_12AC98F44615FB2D.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/89245947895.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/dejifabef.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/geginajitewuwunekobukopuj.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/76351709499.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca6d84d12d---34649425633.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/61696633069.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/bizesunivitemaxasafipoto.pdfIn PDF document text
    • http://om-ar.com/userfiles/file/moxamepizutotetaveki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=john+wick+2+full+movie+streamingPDF 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_off0000b24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5E 15396 bytes
SHA-256: 2282a155a41586f77398d5543f80fff74eb6208bf8a78f4b65063ec832dbe086
font_02_sfnt_off0000f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16A 11240 bytes
SHA-256: 675ae8ee0a0fba423cf1b5a9a17ac39b84a8b61677e54cb76ee2920fffc951d5