Malicious PDF — malware analysis report

Static analysis result for SHA-256 5984978f214e6be5…

MALICIOUS

PDF

70.3 KB Created: 2021-08-13 20:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f1540590a5a2c97d977b14d5f8c8449c SHA-1: 07170d974ebadd97d5db006c185d21d257bae980 SHA-256: 5984978f214e6be57591035ade6177da41a51d1e8691952b8d0e474580bf30b0
154 Risk Score

Malware Insights

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

The PDF file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. This suggests an attempt to lure users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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 http://fszhenjia.com/upfolder/e/files/20210708101331.pdf In PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/c6e38243344d01ec94e093706fee2636/dobuvibadam.pdfIn PDF document text
    • https://unosms.us/userfiles/file/wudiber.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c286a2fbf---42179293774.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/1965843508.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/xivapofin.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/gupetomogeferazuxal.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/33ftnrfan7mnchu0hah07grgaq/xefepemanijup.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/xotupuxelijexexe.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/xexufusujaropizemumep.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/1736889062e4bb978d15e615fed550f0/jixuludotedego.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/sutiwu.pdfIn PDF document text
    • http://yanartextil.com/firma/files/22928078462.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/7213253001.pdfIn PDF document text
    • https://buka.ru/sadm_files/taxukekafaledavufu.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/453a593349973f3902ff7f5d404ab59a/liwozuvedukukuwuzad.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a467e8114f0---bawixuvirufazijomubefamub.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b881f75c298---bolojavawavuwutenobedetu.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/cesqfrg7ln2pdg4gkt4k4vcgcb/mavuxewibokelivu.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073e7e08f9b6---lanemorapeguruwopizulaza.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/e94e7225c5374ccb3583eda2241eb00e/80117127038.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/japem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=baaghi+movie+mp4+video+songs+free+downloadPDF link annotation
    • 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_off0000ef81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 17176 bytes
SHA-256: 8644fbdcb4c6cf294f9e6c7f8f71d42b88458897ae29f4b9a340f7b7101d05ac

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