Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c49417e8e71ce58…

MALICIOUS

PDF

64.0 KB Created: 2021-10-19 11:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5d77f5c91c8a0c408f63a34230df8aec SHA-1: f428a407d3ceba1918a58ab7aebcfe8d4294ebc0 SHA-256: 0c49417e8e71ce582a60e5b31064b52835834b0b3ddea35aab791e53bbbd305a
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that point to compromised websites and link farms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document's structure and embedded links are consistent with techniques used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7793

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://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d08f0a89ec7fa8aa2c3b7c86f7cb2948/90716079323.pdf In PDF document text
    • https://otterdisplay.com/userfiles/file/kaviwoba.pdfIn PDF document text
    • http://honghuibio.com/d/files/xefuz.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/13214299121.pdfIn PDF document text
    • http://aimic.com/userfiles/file/18627621643.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614796163ca83---juremiwejelepogugedasaget.pdfIn PDF document text
    • https://paramourpourbebe.bettygagne.ca/userfiles/file/80890156685.pdfIn PDF document text
    • https://ecosolar-energy.com/piceditor/file/waxuresubewoluv.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/91a315012693ada5f136f793888f3eaa/lirubewogirut.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/fimevisirimivovumukewe.pdfIn PDF document text
    • http://yuhongzg.com/d/files/53729298355.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-10///20211022028457166.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/vabosoxoloduforigubemozog.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/tiraguzivuze.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1614242192df0c---togadizawakifi.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/99855803631.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/sq577g66slai76ud6tv30q9tj7/31126800080.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/64071550719.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/7348727382.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/bidaxasol.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/34cb81328e8f6f0fb60df6ef41df7796/92010335805.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/ninejulo.pdfIn PDF document text
    • http://jarosi.hu/files/file/wozakuwu.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/libawetexekela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/cmwvf4RlXg4/uplcv?utm_term=ram+bhakt+hanuman+katha+mp3+song+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_off0000d6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F6 18488 bytes
SHA-256: 754493ab113e0e5db78581e795c79f77e8ccd2737cddb49d392d14383989405c

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