Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab86300015c844f…

MALICIOUS

PDF

80.8 KB Created: 2021-09-06 12:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e5c247f05bbd14e7bce2448566593e1c SHA-1: 8fdcbc5cb1f17111e4d6bcd893c2a87a5024e95a SHA-256: eab86300015c844f9c6a7d7fc0e60794fe34362869d7ec2cb847865bc58fe8bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://nomylo.ru/uplcv?utm_term=mosby%27s+diagnostic+and+laboratory+test+reference+13th+edition+pdf PDF link annotation
    • http://hzzxtl.com/UploadFile/file/20210626193701686.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/64666829158.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/39010149092.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c9156d21c---65173240060.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161030d2e46f69---mivewixak.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/1731956909.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df9e10572f---zubujagupifunexowanige.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210728_483A4FCE144E8E57.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/sopufapizajosozuj.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/53566282788.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/56508884109.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c923d78534---terogoruwalefaketem.pdfIn PDF document text
    • http://ustunongel.com/image/files/dupeve.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/96298136960.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f78d92e7c---kanulirigudejisabajenaj.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/jodujotosipurufonotatonej.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/62350671454.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/turuvefijajibifefom.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608487309ada1---dinaripuvugemidi.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9f36b3efc---robezalazatoxofilejorewij.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/51584070982.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/53885489940.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/memopapafibejezosanew.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/639ffee962930361c008559b75dc779f/nuxowipuvinabitirizaxur.pdfIn PDF document text
    • http://poorclarescork.ie/images/12465954162.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_off0000d1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A1 18564 bytes
SHA-256: e47ece185752fa7db93025223480dc23db6608faab5c079916d4ef12cf49321a
font_01_sfnt_off0001023d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 11404 bytes
SHA-256: 6bc7437180341e01d3b05e0590f959a2d1f11c41f9ffcc05544ef1fc1d134b20
font_02_sfnt_off00011cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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