Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3394e027729aab…

MALICIOUS

PDF

85.5 KB Created: 2021-09-05 15:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9a7fd6b42d36bdc4af6932a85d4c4e25 SHA-1: f0edaa154cfc0d2ee657c2935946e44ed5b79563 SHA-256: 0b3394e027729aab5ce401945dd9c3c22c08bae412b62bfc617d91958d28445a
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories and other potentially disposable hosting, suggesting a link farm designed to redirect users. The document body is unreadable binary data, indicating it does not contain user-facing content but likely exploits a PDF vulnerability or serves as a loader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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
  • 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://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd18488c5f---pubow.pdf In PDF document text
    • https://steklo-shik.ru/userfiles/file/71447045416.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/mijoxinenufazugagiru.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/513e0c7f1e3b81f806ab1327e291a06d/dijilitotom.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16111afacb5c59---besimagaponodetezan.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/porijev.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86487014550.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/a5a7f955b9fd19aced34e13205651350/89687382894.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/sarivurevejesosawos.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/95185121251.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210829081248.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/5487035053.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/ligakavinobinobe.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/toxawavebirudowejalug.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/97478465784.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/k90besrade9chgd9j6o11m3mie/92609407195.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/viliwesi.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/57366553520.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/gugej.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/69600564017.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/punilaz.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/d5b345c001158766aba85fa717710666/71135948516.pdfIn PDF document text
    • https://seerupit.dk/assens/file/judina.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/57190771646.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a382d801ed---69097706139.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608af6f635955---40260506900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=insulation+class+table+pdfPDF 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_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 10704 bytes
SHA-256: a25fa38313b21abab08d7138ea111380d3a4b7c44867d95b4aac343f97e40c12
font_02_sfnt_off0001196b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196B 17932 bytes
SHA-256: 6fe9d544de393db5fcfadacb92e2a9a34f8a9e3934cf5da045deb89fc6025370

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