Malicious PDF — malware analysis report

Static analysis result for SHA-256 9294fb3db7dcb93f…

MALICIOUS

PDF

87.0 KB Created: 2021-07-02 19:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de9e74b2b4c160a9b0377703e9139c10 SHA-1: 09ef22605f5edc2625ca473126b3c96f6284387b SHA-256: 9294fb3db7dcb93f112649195288b71d3e5b8163aa2dd404666a38ac50467900
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. Heuristics identified it as a link farm, with many distinct hosts and links, suggesting an attempt to direct users to compromised or malicious websites. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond what the heuristics suggest.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.findvoters.com/userfiles/file/tinumuvif.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160abbfa9e1214---92960960488.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160bd61df948e4---18513579163.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf8ee4a6ef---54746991600.pdf
    • http://vswet.ru/f/34361675403.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a065709ddd---65301060227.pdf
    • http://dailymaydemtien.com/userfiles/files/56770535279.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160942dfe2bfea---gakizivugewisozasuga.pdf
    • http://sevvalturizm.com/rsm/files/dolovatova.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/13975814051.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/4c9c464f2867f6c5d920ede2b86e2a0f/7976000395.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/2kgnhfpkqn8nfed45puolbqepj/78397514419.pdf
    • https://samarpanbharat.org/trila/userfiles/file/mesivev.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d845c875175---21322920743.pdf
    • http://poltinka.ru/userfiles/file/13915763459.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/9835356d3bda11a0a9dbdfcf860b61d4/zawujekedeporefu.pdf
    • https://topclassgreenery.nl/images/file/danewuzefa.pdf
    • http://magendans.com/imagefiles/file/31698284542.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/327f124a76c608e5d7785a8637c63304/96142127167.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4942cbfe3c2f645fb27f424070c7a694/sawel.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b89e3eb98---pomagovonev.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4888cf89c---35852647312.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b9b14074bd66663ab9b9fcb4a1102b7c/bemagij.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/e8794d86dd1a2c76e78a9269006a8aad/12014583510.pdf
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/18318370207.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=using+hibernate+with+spring+boot
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/kekasabiwepananilofu.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_off0000ec27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 16792 bytes
font_01_sfnt_off0001043e.bin
9620bf1aba1dd3d677959a228d4f26b1408ebf73925c2b47bde775e810464908
pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 10720 bytes
font_02_sfnt_off00011ca4.bin
49e6ed54721d230baa7acf345fab645d468d9fd200b9d011be880ed50a332590
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA4 18352 bytes