Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1e5bd97c1008b7…

MALICIOUS

PDF

70.3 KB Created: 2021-08-02 19:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bd160fc164b812feba9fa0c74727a41e SHA-1: 0c4bedc45705eb62ee44f1735486f5294c068728 SHA-256: ae1e5bd97c1008b7846683daf97a0524cbb197d67d5e0e791572a3f3e03af305
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of multiple external URLs indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

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://queure.ru/uplcv?utm_term=error+code+103+14019 PDF link annotation
    • http://agrion.org/upload/fichier/99782762666.pdfIn PDF document text
    • https://monocroma.it/wp-content/plugins/super-forms/uploads/php/files/b8faf73f747124e67d789a0c738c0ab1/29297544384.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899c9f52a0c---depofekemomawitosifufat.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/7e5099e457d0c192b649ffa65ed52d61/salesemufola.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/47349570858.pdfIn PDF document text
    • http://torgoborud.org/images/file/46567913551.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaf8eca9b0---fiboruwonozifejamid.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/c03c7b0256d7cf8236f3ec7175eccfdf/gotuxube.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/73162867447.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/bonukuvedutazebogewozij.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/94611130654.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/bakaduzo.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/76334675904.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/nokek.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/07345f909d6126c812ccc588b2eac748/12209056050.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/xubame.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/77852348552.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607202892bf3b---nonakawajigapowipakab.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16076cef6457a9---wosimanowetigoroji.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/lazuzewowojetoriruwif.pdfIn PDF document text
    • http://poorclarescork.ie/images/gawebil.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/f7558610efbc82778e697fbbfc95b124/mofewawomazuxik.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d07f45be957---56522786033.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3847f7d327---purifoloraxolaniderivir.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_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 16936 bytes
SHA-256: dd12b602e97088f53cf559ca85072884391e4d5881c9f7cdfc53e47ba74f0a7d

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