Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16ca0109adabd9d…

MALICIOUS

PDF

70.3 KB Created: 2021-09-03 01:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bced91cacd645e8bf0b32d435289f98c SHA-1: fa17c443ee6f6b13b66829462c2552d1a8f8abf7 SHA-256: f16ca0109adabd9d463909a8574ab0eee4641a648fafd900d7511b41ec29a002
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is classified as malicious and contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm designed for SEO manipulation or to distribute malicious content. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION firings further support its malicious nature. No scripts were extracted, but the presence of numerous external links suggests the primary attack pattern is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6693

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://irlanc.ru/uplcv?utm_term=cadillac+cts+v+wagon+manual+transmission PDF link annotation
    • http://nawoo.net/userData/board/file/24235066838.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c109c6e30f2d245b18ad16aad8092127/57801301647.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/79f25071a0780072bbd15f3c5ec3fdd9/wuligunimufazatuzosaxoxux.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/49385494295.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/jineliwotuka.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/kanamojisexerekowuv.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d2c8b84bad---61735882758.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/19367861958.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805fc9c236f---rozumideter.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/81137507622.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1359ac8b5---51832794088.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/borofanugotepimapotisubed.pdfIn PDF document text
    • https://hoalavender.net/upload/files/jerubovopevowojorabatire.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/vujezosolivowadajupimabi.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/280908065369.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/99084328848.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/54747838335.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/zisuwe.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/xeterigaxixedoritorego.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdc9b72270---20818609108.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9011b1d527---29566549722.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4931f3f08---10635110738.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/55792721020.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_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.