Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce6a88a77669f5a…

MALICIOUS

PDF

73.7 KB Created: 2021-09-19 12:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af6df66011caec0440434cabe9100c99 SHA-1: b915053ed9ea7b54996e517e27f6bfc9c33f4556 SHA-256: cce6a88a77669f5a9b3ab61925cefe228d6756461e384078bd654d6f1383fdaa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external links, many of which point to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.playitdirect.ca/ckfinder/uploadfiles/files/mijajedeliwewazunanip.pdf
    • https://habibitours.com/ckfinder/userfiles/files/15832799373.pdf
    • https://valerart.com/ckfinder/userfiles/files/foliriwiwoxivomikoxaze.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161464dede6bf6---16560515100.pdf
    • http://sswjeans.com/files/15441561318.pdf
    • http://vinacafe-dalat.com/Images_upload/files/7191806054.pdf
    • http://pdww.ru/ckfinder/userfiles/files/28713745544.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16140c4a2aa398---lumijatifurafivasatutite.pdf
    • https://adasms.fr/userfiles/file/36680797113.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e40bca8d3---baviz.pdf
    • https://cezartravel.hu/userfiles/file/mababubiregas.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/ee8f844f246260566557a321a995fcee/60843298920.pdf
    • https://citytrafik.nu/images/file/24957384402.pdf
    • https://yennenga.org/business_school/uploads/file/8598399253.pdf
    • http://redemaisfarma.com/userfiles/file/79684845914.pdf
    • http://savytrading.com/userfiles/file/1724797868.pdf
    • http://anm-av.de/uploads/files/rofejelegem.pdf
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duwotemoxali.pdf
    • http://nanumed.ro/uploads/files/budadujonataxatovoxifolez.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/6cc33b43ecf141cf7e75eb8e91a61ade/60989469093.pdf
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/99892609649.pdf
    • http://kingbikeonline.com/images/upload/File/tigijavu.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336aac0dbf5---vivozaroloderedalobanew.pdf
    • http://aquamedia.cn/ckfinder/userfiles/files/kotetaxapaxilewolexeg.pdf
    • http://tangiahoang.com/skinkorea/Images_upload/files/82488221585.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+kissing+booth+full+movie+free+online
    • 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_off0000bceb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEB 16792 bytes
font_01_sfnt_off0000d4fd.bin
a65b86336a878cec1b1254fd7d47b17fcbe65c08e523bf59bd41d85abc08ec11
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FD 16672 bytes
font_02_sfnt_off00010008.bin
d550c106aef56e1e5b295f41a46884e2cd948b49c566fd410b6e8cd9add5d231
pdf-font-stream PDF embedded font (sfnt) at offset 0x10008 10860 bytes