Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a1b5c39e2a9947…

MALICIOUS

PDF

98.9 KB Created: 2021-06-16 07:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e60c5fc3f89a7c4a56cdd42c9e1164ea SHA-1: 5e0037be32647f9b04891795e9881fd521ed2c6c SHA-256: f9a1b5c39e2a99476390bd07aa4ded15808066e39c4fd699d4fcd7e6abfff1ed
124 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The ClamAV heuristic identifies this as a phishing trojan, indicating a malicious intent to lure users to potentially harmful content. The presence of multiple distinct hosts and a link farm structure suggests an effort to distribute malicious payloads or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3002

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://garglob.ru/uplcv?utm_term=coh2+best+commanders PDF link annotation
    • http://bronia.org/userfiles/file/56915506989.pdfIn PDF document text
    • https://sambelteri.com/contents//files/mined.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0e5688527---18689213043.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/a2c48a3007a93182e1005250c00993f3/sebubeviwagalurisoz.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609744f9a3260---wupak.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/sowurowibaxumodaw.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/91464422804.pdfIn PDF document text
    • http://contactconfiance.com/files/files/35168088873.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c78eee0d482---xofovibidekizetetizafer.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/niwopobebigetikipeb.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b285545252a---pasiwupiweluku.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/1f9549b3841e2658193d730e1b6a0100/8532607678.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160981d1b2ef54---porawifowibawamefomaga.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609268c6d21d3---wogane.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16070aed46e7b1---wazomitujabatof.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af013b1da25---47203811600.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off0001390d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390D 5324 bytes
SHA-256: ec3e755779cd73a67b444614ca66c6c81e5394cf9e5174bd8c5ec9fe05025cc4
font_01_sfnt_off00014af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF3 11664 bytes
SHA-256: 743d750d8ad280574d9860fe836ed0114c45b0df0818e3cc5e4dc4b3f9db3ebb
font_02_sfnt_off00017206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17206 16240 bytes
SHA-256: 22e3a265051de049fcf7fb23205ac081a5706510055ebc504bc7ee755b3f2d84

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