Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b705287bb2a2433…

MALICIOUS

PDF

211.0 KB Created: 2021-07-13 16:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b5e9fde8d07a0c57689e25d7359af340 SHA-1: 180dc4f5d5cdb159c729d65a5d034fa60838d83f SHA-256: 9b705287bb2a243371c329dddba293fd9aa00ab35681ecff800ad18f0236a85c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised WordPress uploads, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

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.
  • 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://pixomot.ru/uplcv?utm_term=mathpower+7+answers+online PDF link annotation
    • http://vom-ragnaroek.de/uploads/file/2303515508.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/repotuleb.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/31f9cc72e0d1b8ad238abd49d1b0bd08/zadebul.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3b60da19e---vavisavogikojuxofawefeku.pdfIn PDF document text
    • https://grandegroup.net/files/tifaxixujabadekezuk.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dscqoh6ngiivqt0g9d5gpia7k7/loxadosagaxadaranole.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2158d60237---55424627097.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609acda76faff---65410583183.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/8958024123837f8609276b6684ecaa40/zunatobetepapobukopojaw.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/revabanokobolozezise.pdfIn PDF document text
    • http://jkohut.pl/file/69853737717.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/dojev.pdfIn PDF document text
    • http://starlightcelebrates.com/clients/4/43/43e9139217482d7666ce300faf566241/File/27208101187.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/v4rd1j9kcuhk66j4p6vfaj93q4/33216600032.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626b8e09d9---56890414572.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16073a923992d4---zelopufafevudimajigip.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/2424611077.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/kavasujamari.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/7446806906.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c668697cf---54279609550.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/58747e5da7fa128c9ee4c2566df91be4/50115611945.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9541af83f---7525263882.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b576cb4c8bc---xuwipaxaposi.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/nukakebo.pdfIn PDF document text
    • 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_off0002de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F62D 18044 bytes
SHA-256: eedb2529d471c13707a41d82266f480fc522e445e698f564aea98c61887524e6
font_02_sfnt_off00032626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32626 10480 bytes
SHA-256: 511c81bac24824a7cf9a198f48f33fe177805b530ed63cd2ccfb97c223b71d55