Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ff59b5defb8d05…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 05:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c69645fbaa2a93c1d7ea127dbeaa9d97 SHA-1: 051a62fd53387d25d55794f6e6398b4c02f5d73c SHA-256: 71ff59b5defb8d05b44ad4e748341dab393b3140eece1e00abeb1a7c2513a95c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a PDF phishing trojan by ClamAV. It contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4270

Heuristics 5

  • 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
  • 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=en+la+cama+con+el+diablo+cathryn+de+bourgh+pdf+gratis PDF link annotation
    • http://hagelkonzept.de/userfiles/file/32392874824.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/ec8af5ad0f80c1d75de91369b7fc8b01/20232115428.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/jotinapovexatumiden.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/90590649116.pdfIn PDF document text
    • https://chineseclothingonline.com/File/80690623510.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210919070932.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16141ca4c217dc---puxogupaxidejirufafedi.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/45908414173.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/161476c75ec17d---8416829811.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ae51f92c0e8bd52e461d5cd5db125ff1/64637898318.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/90063929571.pdfIn PDF document text
    • https://mauspro.net/upload/files/lerizibirut.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/dudanosawesemelomev.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/65375958618.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/tigusetisak.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161334ebc161bc---77834998719.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/jenir.pdfIn PDF document text
    • http://bastola.org/userfiles/file/69293205137.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/wepokofijiz.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/gupawivi.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/57475029077.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/e7429f22b355fbb2a20bd055aeb955ed/rirafavew.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/31218888122.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/nupikuwaw.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/tesek.pdfIn PDF document text
    • 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_off0000b947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB947 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD159 18412 bytes
SHA-256: 30506337638559f734901f92c2c41e8ebc2705fcb3c0e58a5700de7d0b248c06

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