Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5799643e3f465ed…

MALICIOUS

PDF

74.8 KB Created: 2021-09-24 08:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 77bf5f43bd22c960568f357cf474948f SHA-1: 971720562bb1e9061ab29f4c3db8fc696f65b64c SHA-256: c5799643e3f465eda31d4f03d4f8d27083ff6d0c5f4eca7e597e2b7c1fea3cca
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4746

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 https://coretry.ru/uplcv?utm_term=usb+not+recognized+android+phone PDF link annotation
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161463b34e4e49---bebilowuduruvemutos.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/62729207164.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/285746555.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/42673889701.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/36150917240.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/mqq4kededhg31gel9je7n06s78/jobatasevuxefufiratuvub.pdfIn PDF document text
    • http://www.pvvc.cz/files/82110442211.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/61482207864.pdfIn PDF document text
    • http://ikansambel.com/contents/files/koxevobamuzales.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/45631159090.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/rovupisegalemipod.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/wozixa.pdfIn PDF document text
    • https://flyags.com/editorResources/file///sewoza.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/74503338243.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131f891ba3a5---22532538495.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/40741223444.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/fotiwu.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/nugatafuzepositurovulos.pdfIn PDF document text
    • http://bubb.cn/up_file/file/xolatajakajaso.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/sajarosezakem.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/zoreporub.pdfIn PDF document text
    • http://balalajka.nu/media/13100311576.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ce914a8c1---10233902062.pdfIn PDF document text
    • https://phr4u.com/files/mitibilalomunug.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161497fa398ab8---lilajidirukon.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/vobogiwepogikuwixugubibej.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/bememufenovazifolata.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 10956 bytes
SHA-256: 7c32627a6523993edd5d26d0418d1cc18e864cf364b2cd73ae5b2952612436bf

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