Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd8fe8850205a0f…

MALICIOUS

PDF

71.2 KB Created: 2021-09-21 19:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 501f71f50a1484ea1639ac28a9db50b7 SHA-1: 92e8692dde4b71dce7b4cdc516524ad559731660 SHA-256: 0dd8fe8850205a0f0eb66c9f58fd62cd2125041b6908475531618f417172e47a
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, including compromised WordPress upload directories. The presence of 'utm_term' parameters suggests an attempt to track user interactions, common in phishing or malicious redirection schemes. No scripts were extracted, but the overall structure and URL distribution indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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://catamma.ru/uplcv?utm_term=smart+iptv+apk+2020 PDF link annotation
    • https://feltshoe.com/userfiles/file/xuzopuronelatutisudan.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/xutuw.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/zenujenowasilen.pdfIn PDF document text
    • https://guanlai.tw/uploads/files/202109111117336798.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/89744877401.pdfIn PDF document text
    • http://plan.msu.ac.th/ckfinder/userfiles/files/visijak.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/41038475157.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/fuwegetamaf.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210917104646.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/12495079343.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/fugujovuzafofikojozuxuna.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b204733d4---92265264189.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/tikigaxunoniwojobolano.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/81527356061.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/70edb5771369f95d5a392db9d8f4de29/rexaridoref.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/pafalugon.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/birosukiboginafovur.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/38622826386.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/42538961055.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/nuxizu.pdfIn PDF document text
    • http://abnicum.com/files/file/sekifowobudalule.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614229651d2f9---soxeguruvab.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109140544136777.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161496734ba5f5---kopefuzetumenefo.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/bonukomogopumelevas.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/pifufovevezexavag.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_off0000d58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58C 17008 bytes
SHA-256: 75fae0b5f0b219fed5ce927695f8faaa84378e45f3792536f49dfe6ce930c706
font_01_sfnt_off000101b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 10316 bytes
SHA-256: 08fcfd9562a1c3efccf9d23f7971b6fcee26c2ba62380fa22ac99ec74b8cb9ba