Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e64270ebe063f3…

MALICIOUS

PDF

88.7 KB Created: 2021-07-15 12:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9fed4b8f7017dde615c3b1c9a235c7c0 SHA-1: 39637efdb92e8d2d711cfcab03ffc0a3edd2f3c8 SHA-256: 00e64270ebe063f39d59dc47ec9b1d84e6baec319bfdb59c5200b3df6d3ca95c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links. While no scripts were explicitly extracted, the nature of PDF documents and the presence of embedded URLs suggest potential for JavaScript execution or redirection to malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2547

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://arnetbilgisayar.com/upload/ckfinder/files/retozukipufe.pdf In PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/ja01i2d5va8ab0hkdqr5ss0a4k/fagumizofeput.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/wozefubu.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/zabaxitegokepel.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/54836008644.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1609893c230863---9977138474.pdfIn PDF document text
    • https://argumentua.com/i/file/jofugifunitomaluriguzufaz.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/49156158452.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/lopevojumiwuzasimoxir.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/75520096417.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609003ba542b0---29216419462.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/baa0eef4f9777bcef11007ba5e1bb369/tevigogowesedow.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210622_212948.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc0f5526a1---xosufo.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829f9d00d49---60588872346.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/d37baea54799afa384ddecc7ec9507aa/buxotinizowijutonetogab.pdfIn PDF document text
    • http://egonseetour.com/FileData/ckfinder/files/20210616_2753CEC0D1925E8F.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eb584e8a5---59399856339.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/33b6974e9138ff3e6c8779ae9e381350/babas.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f74cc11c0c---fawuwomiluba.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/9cc0c393dec16afa362a460baadcad33/sejulolap.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee65f4ec182---rituwojugavibedo.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbaf840c12---xesiton.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pacific+time+right+nowPDF link annotation
    • 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_off0001032a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 10656 bytes
SHA-256: 6849547bae739b65c2c3bd9312278a565a74726b65b07d11f857a47412b4ebd4
font_01_sfnt_off00011b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13388 16972 bytes
SHA-256: 29e7d353523752e0624165f7c552c9e0399d6fe4e03ffb7dd669407b72067266

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