Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb75200a1cc34a9…

MALICIOUS

PDF

76.2 KB Created: 2021-09-02 04:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7d29bfc0adf51b60b8b3e877afab33f SHA-1: a7ebc2ea2415c6fe6bdbee5b55fd17d65077dfc7 SHA-256: abb75200a1cc34a9d22eeb7c72b9e41be954732f84c012027e78a139c8413e94
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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://smidgel.ru/uplcv?utm_term=where+is+my+phone%27s+recycle+bin
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/12e078347eb79a3807ca0f41ddf33a1d/godawokomekikeko.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/fp5dpogk5c2jn6k6cnl2pv1qm0/kizisugifabazedonetasi.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/14164f1075461e272cefe926ee05a6ad/34193902864.pdf
    • http://songhandiban.com/uploadfile/file/2021080611594373499.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/8353b9672e7fa88b9bfbc39930dc93b5/50000594612.pdf
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rikoxuvujutamizela.pdf
    • http://owtsreunion.com/clients/e/e7/e717deb27d844c69ffc49b2d3c0bb1a5/File/tubararefiginexewib.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160946eb63aef3---nudubibutem.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/molavujovolibagaw.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129aae6aeb67---vukinolivinema.pdf
    • http://naszymsladem.pl/upload/file/81934531252.pdf
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/fisilezawewonazitinow.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160926cb604e35---zasedumaroropeka.pdf
    • http://3q1p.com/upload/file/210806115131951252lsza99ce7u1l.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/slegg323pjlla3bogjcaacnsja/pofat.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613020e23f5e2---sisepematonolubozix.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e5b4cda26---molopolixejevumarib.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adc8a1354b8---nonelazuwogit.pdf
    • http://goldartline.ua/userfiles/file/84008527809.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/gmfurk4r3e84k25ss4fgaskecn/nibopu.pdf
    • https://www.thc.gda.pl/ckfinder/userfiles/files/55935574104.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d492.bin
89e3dd8ba115f3871083d2e327971971c3eac9ea4730b0670d610dde87c0d3a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD492 10660 bytes
font_01_sfnt_off0000ec9e.bin
8136077164cc5d8e59fd13bd4a5915c69fe81ed17c3aeee1793f615e031ecd58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9E 17196 bytes
font_02_sfnt_off000118ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118EC 16792 bytes

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