Malicious PDF — malware analysis report

Static analysis result for SHA-256 e706fcab96b53da8…

MALICIOUS

PDF

103.8 KB Created: 2021-08-19 16:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3591a4b011f635a7bb497bbd99545776 SHA-1: ec7c1d07e9cf278c6f134892e4408895efe6ae53 SHA-256: e706fcab96b53da83345ca344049972abfcc66ef397c7a2d4be48148424469ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which are compromised CMS upload directories, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://xn--k1akb4c.xn--p1ai/userfiles/file/vixopogenizalesajaxefapok.pdf In PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160edaaba16c1f---jotewa.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/dovura.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/redufepojupuzajuwigi.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/65983724096.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/fabaf0176c35196c01e3a11b798ef67b/6126090858.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/tobejotufuxuwomas.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606eedc81ead7---rekot.pdfIn PDF document text
    • https://somogyplusz.hu/files/goduzowopobotozola.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a835d1f96d---1813520702.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ca63bcd4f6f127707b95714c4135c2e0/nuloxapasibufowidazoju.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/zowokojoduvasowezil.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/6e36ce5ca9e47e2cd26d6766d5886a29/90394363317.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610eb6e349124---nitalirap.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/97444082657.pdfIn PDF document text
    • https://ebooksweb.net/files/file/gipafewexosenuperup.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/20538617680.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080151a79a61---85315153806.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5ec6a9a9c---jenosiximewisokadamofejev.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/94728234946.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/seden.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/46847454564.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/dimasufadapo.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16106b4714b883---54930842322.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/lifamim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=%D0%BE%D0%B1%D0%BD%D0%BE%D0%B2%D0%B8%D1%82%D1%8C+%D0%B2%D0%B8%D0%BD%D0%B4%D0%BE%D0%B2%D1%81+8.1+%D0%B4%D0%BE+%D0%B2%D0%B8%D0%BD%D0%B4%D0%BE%D0%B2%D1%81+10PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAF 24912 bytes
SHA-256: 3f760300c17ce33b50cf3de8b3bfe57cb7f7d4c72cc95170b150e3277e3ca990
font_01_sfnt_off00015e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E8D 10580 bytes
SHA-256: 74983325fcfcbcb54063e4987ddd7550663b8f723db833e682224557015f7123
font_02_sfnt_off000176a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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