Malicious PDF — malware analysis report

Static analysis result for SHA-256 396425de963f62f2…

MALICIOUS

PDF

86.0 KB Created: 2021-07-06 01:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9ce7264e25146384b6e8b0287cb2fe25 SHA-1: 969a03f272c558fa923a9838cee9d3e712d741ee SHA-256: 396425de963f62f294c6b511126457cd49afdaf576801ad6ee75b54c0037183f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5699

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
  • 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://www.kickcommerce.com/userfiles/file/xonoladowavu.pdf In PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/5e61945676e63226b436248f1285af12/vabolixukikujuxekezunuje.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e5d105721---65967239110.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/h4chq1d6esrdn3b1ika53u6te3/96356071789.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/8f6120657e12e0908263b2efb77249d4/56248409352.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/2909908303.pdfIn PDF document text
    • http://evola.it/userfiles/files/81938266249.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/23778646655.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093dd7e224ef---14114686174.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210512104503.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/souc3c3gmfubu8fl0grvtj2ti7/91106556314.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5761c046bbeefedec33e20cb3c8f5a96/dosodagovurelatove.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/fidagoneduwufugodakevix.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892515460eb---jalubewujudaxezawavif.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/fetobodivebigatefapez.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/49tdm5tsgjtdoerfj9tiv68dv7/77023974082.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/xalodirakubakebe.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/rs95tl7vmomp1nv7b5remnh9aa/viwimapozepalojokowotige.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54b284cbc---buxozaw.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/3f0abcf09eb202f0646175182bdefc52/70480565404.pdfIn PDF document text
    • http://huiking.cn/uploads/file/050823546078.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/7q7bd4pk4noc9allm36v07amg7/49501232495.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/31335601136.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd09752e26---wupodupemowotevikaxa.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/vazimowuwudumu.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/7ac7ef0a7d5645373079679241c66037/zogaser.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/9c44bc03324dcea9e314d303613b59dc/kusovubaw.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/00e5223c0816c967ed9abf1dea493401/86427021166.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=god+is+a+woman+madonnaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11609 10156 bytes
SHA-256: bc0268a5205843b469b4b93b196bd27e5cefca64f936382e9226b40c0181e9b4
font_01_sfnt_off00012cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC3 20788 bytes
SHA-256: c2ef0f2039f34eb75829829ea477d9633a33fa51e18729a0b7ce01dc4ce9ff42