Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff4d9fbc116c737…

MALICIOUS

PDF

81.4 KB Created: 2021-09-12 16:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56d3ed3422faf334431f3d20f0a372c8 SHA-1: 88650542c69c456f42486b4b6a87605a520c2710 SHA-256: 4ff4d9fbc116c737e751742f79700bf14bb95a893a682c44c31ba7c3260931b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or are part of link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c7eebe201---88727050080.pdf
    • http://omeofest.eu/userfiles/files/fojut.pdf
    • http://tieuhocsongphuong.hoaiduc.edu.vn/ckfinder/userfiles/files/dolabopivozimebugarale.pdf
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vobilapilijewozetin.pdf
    • http://palletgoanloi.com/img-dn/files/46093557277.pdf
    • http://www.puhito.hu/uploads/besitujalawa.pdf
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/levuzoxirufejotazetabu.pdf
    • http://portaldo.eu/contenuti/upload/file/lupuribanidirawosadorano.pdf
    • https://hfbee.tw/upload/ckfinder_temp/files/20210909091952.pdf
    • http://24cvety.ru/upload/files/186860995.pdf
    • http://iweldbot.com/ckfinder/pho/files/zuvaxatidibevulovilokera.pdf
    • http://chinajessie.com/seadata/data/uploads/img/file/163084790719.pdf
    • http://gruppocaminiti.it/userfiles/files/kozotixulomu.pdf
    • http://bridgeonlaw.com/filespath/files/20210910115622.pdf
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/ladulap.pdf
    • http://gianenricofabro.com/userfiles/files/wirijedofibawimejowaxoda.pdf
    • http://homelife-superstars.com/image/files/nipajomazibiwofokajimuf.pdf
    • http://i-harmonics.com/upload/files/23369411802.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/eb3490b0647c4f9bc10d3417d58a13f2/44934684249.pdf
    • http://live-lessons.net/lcj/web/uploads/assets/file/tamikevufizokimal.pdf
    • http://bige.vn/uploads/userfiles/file/18707339966.pdf
    • https://simplehome.ro/ckfinder/userfiles/files/vebitejirikisuxojiwexaw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+gta+vice+city+cheater+apk
    • 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_off0000d762.bin
5ff0646d54fad9186a6d44b5ea42ff6f9785059302d253cd86c0530ffef69b79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 10984 bytes
font_01_sfnt_off0000f0ad.bin
0a5613d00616e66ce1206d38fb5fea514f3e17cf0734f0e7f3c98060e5735e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 18120 bytes
font_02_sfnt_off00012020.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12020 16792 bytes

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