Malicious PDF — malware analysis report

Static analysis result for SHA-256 e513d5a984d3722b…

MALICIOUS

PDF

76.3 KB Created: 2021-09-06 13:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32e4108a4d169f304c2c458513ba332d SHA-1: c416dca5c4d496ba921a2616b26f3ab5abeef774 SHA-256: e513d5a984d3722b668c8cb5aa966daa9c7a55a2204424c04f6a3c8f1e500245
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. The file's structure suggests it acts as a link farm to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6700

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://tunglamgarden.com/images/fck/file/86040253869.pdf In PDF document text
    • https://camping-du-lac-dijon.com/fichiers/21543442047.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c86a312c9---gagikirofiboroj.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/47056063406.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160775e86862f0---wulasukagoso.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/37af5bae8f88aa1f4f0d9d7179eeb46d/pufofig.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/zefaxuxaje.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/rogemite.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/16814024560.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/27420333025.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2266dee6ba---11919487598.pdfIn PDF document text
    • https://emmaushuis.org/pages/72556830565.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/27084062987.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/27065280630.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/72249250894.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082f8bf4b25c---4795214709.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/53477028909.pdfIn PDF document text
    • http://ramz-alqassim.com/Files/files/6989148167.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/tuzekumigero.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610002108876c---xapisikogeji.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/rapaz.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e18bc6162a---jatiko.pdfIn PDF document text
    • http://licausi.it/userfiles/files/sanodidufu.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/ca0b6e7d7384d3d621297eeaf44417b5/pebelotovewifuvozixokin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=present+perfect+continuous+exercise+pdfPDF 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_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 19356 bytes
SHA-256: b9fbd555c70b830af7ca59e27d24df195dc0edd50a2739b2879a15bc01eed675
font_01_sfnt_off00011de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE9 10608 bytes
SHA-256: 2543f8318f279227db883116cb09b2f952de98bd29ef119a3fb6b722caf9795e