Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d0da949f8eba9b…

MALICIOUS

PDF

104.3 KB Created: 2021-09-02 07:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4c8d9c66eecb9eadc5968d2858d1edd0 SHA-1: c9321a1cbceed83c5de3a5e38427815a0fe9fad1 SHA-256: 82d0da949f8eba9b3a443bff3106d45e2b89db31c5619bba03b320ffe304c1c1
124 Risk Score

Malware Insights

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

The PDF document contains a link farm hosted on compromised CMS upload storage, as indicated by multiple heuristics. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The document's purpose appears to be directing users to potentially malicious or phishing websites through these embedded links.

Machine Learning

  • Nyx PDF Classifier clean score 0.2108

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://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/b30638ba0508294450481de866522c53/67594823902.pdf In PDF document text
    • http://explosivedevices.ru/media/file/vepiferer.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/welomebugo.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/43631871015.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/591ef9e8380da5199d5d1a9138ff1a8a/mulesuniv.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/90041695323.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/61675171169.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/40347629064.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/70897638317.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/76777310451.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43183376985.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9f7cb7dbf---xisufimojutotaropitog.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/nexiwifiwaweli.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/powogafegoto.pdfIn PDF document text
    • http://ibb-online.ru/f/file/47487136186.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7b72aa22f---82341254488.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/benavul.pdfIn PDF document text
    • https://tavio.ru/files/file/48406571222.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c0b88093b---rapopibemoleguwivu.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7fb24b5b2---51092587162.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/48826588596.pdfIn PDF document text
    • https://crbz.ru/userfiles/file/rusexojukuzafoxu.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/kugivokukezuto.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fc5e60a9d---65709800078.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sore+from+stretchingPDF link annotation
    • 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_off000150bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000168d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168D2 10648 bytes
SHA-256: 103298299ca3a23494a70f1df62d8a787f4152c4cbd5d051d1c4968f0ed39bd7

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