Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e5fe5a78f4b2af…

MALICIOUS

PDF

72.0 KB Created: 2021-06-20 02:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 85ee84f726cf56c61f38aa42b79c9039 SHA-1: 097a51d95978e9b182628995c91a73f25e67e00a SHA-256: c7e5fe5a78f4b2afb6ad6c0278b097856e275c84b3e85302b5f89ade5f9ceb97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the document body's reference to 'who is the richest person alive right now' further support a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9671

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 http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb29eb6559---67870204423.pdf In PDF document text
    • http://www.vegagastro.pl/upload/file/tubexuvokofegenarisadul.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/b839035d8da073793949d1ce7ace95b6/36362812564.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f5de949ae---82543700638.pdfIn PDF document text
    • https://susta.vn/userfiles/file/dodoronebogowu.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/6f5725ac7138ee1b4176b6b8c9fbda03/folaxizadifawiwotupes.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec595c3ea3---61775950346.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/9vlvs5ltt75jnmmokt4gv2osta/34224611328.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/popikarive.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/pesowokufuzenuroz.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/rupovufitowizejoveperevi.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/nklia8usv3e9bmhfgo6d1f5r3g/pezusalebuwibigasubaf.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f08ecbe85---31062962371.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609875fd67aab---95045579282.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a012a6c9dd6---lawufefewojigiwezajegoxug.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/fb6810c7e6632a3a906ce2c439113e44/dedatobodixudu.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dda61ef33c---nisizemetipezozakufax.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/furediv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=who+is+the+richest+person+alive+right+nowPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE651 5360 bytes
SHA-256: 4ce5a0612c4306076c58e796d491b449b9c7145ea254f699015b88a9bcb142e8
font_01_sfnt_off0000f8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A7 11340 bytes
SHA-256: b04476ba8c6996f140b0317f8d6c6a3dba03cabc1b70488220f2bdfbf7393120