Malicious PDF — malware analysis report

Static analysis result for SHA-256 60201d68d3f5b588…

MALICIOUS

PDF

72.8 KB Created: 2021-09-16 15:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8fdd347c74059a3822cd9ae91e9239eb SHA-1: d054a0041e66072e8b017ba9431e70afbf4e16df SHA-256: 60201d68d3f5b58856ee59542beb6495503c3bd9ff95100b2ee8300dfd27d836
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The `utm_term` parameter in one URL indicates a potential tracking mechanism for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://smidgel.ru/uplcv?utm_term=my+talking+tom+3+apk PDF link annotation
    • https://triyoga-tv.ru/userfiles/file/46014241902.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/xoveferizasewupote.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/nodusutelubumorafaku.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/8661816472.pdfIn PDF document text
    • https://netlandschool.cl/files/70417074774.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161374dde8738d---jutepugekirabopa.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/7294249341.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/miwejole.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/sejuzaxizubotokidigebepum.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/kesopamib.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/90334118509.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/a2846abbafc34098e9ec37992d4c6593/fugajofilojirik.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/89115830427.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/61156757888.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/devoligabopav.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161388b9b05158---kaxoxavirawipu.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614042a104306---bofamanadowujabugadidab.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/6414186229.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/19898654341.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5d462a08e---65021262972.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/83100376277.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c10e2ce68---30999355094.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/nulajufe.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161335db19e594---bimukimibut.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC80 15996 bytes
SHA-256: a79ad330cc8e95585f9f4c15bf00c65cc37846b48716709aa60fc28309a02e7c
font_01_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 10564 bytes
SHA-256: 028998d92180f004d00ca3683fe187f7fa824289a21dcbb78590ab53cd463fe1
font_02_sfnt_off0000fd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1