Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c650a7a1b0c16c…

MALICIOUS

PDF

85.9 KB Created: 2021-08-14 14:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 660c253897453c281556e49cf0d87308 SHA-1: 2356b12ff50749727efcc9a96e3d618dae034509 SHA-256: 05c650a7a1b0c16c3dc46826ad0a52d1ca23af98d29a1c0f60b48831074f24ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to compromised WordPress sites and using 'utm_term' parameters, suggesting a link farm designed to lure users to potentially malicious content. No scripts were extracted, but the presence of numerous URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8422

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://medvor.ru/uplcv?utm_term=autocad+training+manual+free+pdf+download PDF link annotation
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9590293fac---kobejojeripolilamofujazon.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/6339916703.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092af5b7c7ab---16667213527.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/natumixenope.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/87357413636.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840fc391a06---92870110521.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/tirusovaxagirosezaguvuku.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090dc767efe1---guvudefiwan.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/ronisi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/378cbba90079eb1db706c4dfb7831824/dozanip.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097aa0bccda3---fevegokesavinivamuwerise.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/zonenotevumokoxajatufor.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/34795072288.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4f0b6e7556e5f1ad8c5ae990bd4f1d10/27126265942.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/basik.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b5a4885d82aef043c189c09c26d045c0/97819942318.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/q0p4dhdabgk7e4ojpt3goge7ad/38398816614.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/tuzazabowuninumoviwokal.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c8779daaa8d---gosipebitozadoxosamomus.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/5531b93ada151057b3e3ee1442cc98d2/sagepofujono.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/56059069800.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/xazoresulovapev.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/14197280145.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbdd1358e2---16508517789.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_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 19392 bytes
SHA-256: 979b1192617d9b36d4214e5ba5aa810b23408f6d233bcb029be4a807be331d36
font_01_sfnt_off00013a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1