Malicious PDF — malware analysis report

Static analysis result for SHA-256 59605c7ed7d1eb96…

MALICIOUS

PDF

81.3 KB Created: 2021-09-20 05:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcc6e1101b01997b99a492a6d9479be1 SHA-1: bf887b6a1105d455572c17702f84cf38472904c1 SHA-256: 59605c7ed7d1eb963bc63e5a377a4553659f28e317315741e165ebf932848069
166 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a browser extension installation lure. The document contains numerous external URIs, suggesting it is part of a link farm designed to redirect users to malicious sites. No scripts were extracted, but the overall pattern points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://archism.ru/uplcv?utm_term=how+to+open+chrome+extensions+in+android
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3d9617d971c480e778b69f9b71d973fe/87663950917.pdf
    • http://unionnutritech.com/upload/files/29591955228.pdf
    • https://bkairconditioner.cloud4demo.com/uploads/files/noxixirulogegepuf.pdf
    • https://arerp.kr/data/file///bijusozowo.pdf
    • http://okeefesreef.com/ckfinder/userfiles/files/mibozabakiwegudomepati.pdf
    • http://www.grupoaccs.net/ckfinder/userfiles/files/20143980582.pdf
    • http://al-bandak.com/userfiles/file/8062059438.pdf
    • https://activepymes.com/pub/file/kizidibeluzi.pdf
    • http://cartonwrappingmachine.com/userfiles/file/11201853343.pdf
    • http://texinpack.com/uploadfile/file///2021091306011152.pdf
    • http://studioarchoggianiepartners.it/userfiles/files/92423127245.pdf
    • http://sashtraayurveda.com/ckfinder/userfiles/files/rabir.pdf
    • https://bimore.vn/webroot/img/files/vivedenobudejurirub.pdf
    • http://mariautonoleggiomarsala.it/userfiles/files/74032556973.pdf
    • https://plasy.com/uploads/file/77114310295.pdf
    • https://beta.nhatthiengroup.com/files/uploaded/files/jararuwabojole.pdf
    • http://lachambredechos.com/userfiles/file/5961943131.pdf
    • http://hpworld.hu/data/pic/Image/file/xixadekofi.pdf
    • http://abwrosedale.com/uploads/files/2790582384.pdf
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/dimojagujigipaminitusat.pdf
    • https://beldapin.com/calisma2/files/uploads/14315087068.pdf
    • https://aneri12.eu/res/file/7777243500.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d857.bin
ed447b036b445776398cb976ba57295d4fd90d36e42ab2f13b6af65f19abba4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD857 17624 bytes
font_01_sfnt_off000105cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105CD 16792 bytes
font_02_sfnt_off00011de4.bin
9d08599180b09d5d1879f62e7b266d62942c5d1261708aab6c3512a49d7e2f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE4 10912 bytes

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