Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f04932cc821d78…

MALICIOUS

PDF

64.0 KB Created: 2021-09-18 16:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e34285cd03a318f5dae53fbea938382a SHA-1: 8590db1cc08647aca5aaab8d4672088e2fea63e4 SHA-256: 15f04932cc821d786a1d6364669389d24ec1b6e3e66fa2c1e24a97bec69aab67
154 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7086

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614134126146f---dagipubejibofujenetetor.pdf In PDF document text
    • http://mannadey.in/FCKeditor/file/vodawa.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/bifetevowukasap.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/zewenuvezureraf.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/videbefuxuxedijebopu.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/tipofebinifetemusivuvu.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210916_1165A9FA76CD96E6.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d2c4a84fd0b0753ab115c2fa9f5607b0/62854420800.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/43557636206.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/61140430211.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/99375096052.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/57673601582.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ceb02538a---50904387369.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/badumuzegizina.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/7845095133.pdfIn PDF document text
    • https://ms1oke.com/contents/files/wajijuzujelevuritaduroju.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/gesasaza.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/34459551438.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/vudafinuzotizulimekitojul.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/sunegumaxebolokimuvaveto.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210913214827.pdfIn PDF document text
    • https://frutalmente.pt/site/upload/file/dixeneluzefowifazijebulo.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/boxefa.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e663288408ff913b2ecaae2b8b3b03a/gowelozukedegimovenej.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/zukawimikipabenewan.pdfIn PDF document text
    • https://norservis.info/files/files/misewoji.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/10703171133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+draw+on+pictures+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40C 10640 bytes
SHA-256: 130deb3330c680d73251a3d17794e58675d87b6926988b546e86b921b1afa48f

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