Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaec929c17fe944…

MALICIOUS

PDF

81.8 KB Created: 2021-09-07 00:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: d64ad7cfbf0dfdf8e0c1c2e4982acb7c SHA-1: 6ac4ca6f9883c41b6531389b243c6697c95f00b3 SHA-256: 7aaec929c17fe944fb5bc74381f075407bd66335f27956cddd355e91278da10e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2548

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://wastran.ru/uplcv?utm_term=aspose+html+to+pdf+external+css PDF link annotation
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de5e1c73a---xekijipasuk.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082557b882ca---pokuruz.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/99422888870.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/tabenusebomediv.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/67506999675.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943771c39f7---82626597067.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/098ai1lj8mgmimsrtmkm1n92ac/21606308054.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/17605381499.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/38978285505.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b56ebdaa7a0---bufesabajojowup.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/97010125038.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ojg5h16lc7dpnp66q35rci7gi3/71205578327.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/14303460232.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775f80eed24---larunomemaxi.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c89263e8627---furifelimigexiwejusiwosu.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/nonejofagatupepis.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/379f7277b2ad4a75fbe7b393ba1a4493/87367635263.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e7be680299baedc7c52de7f5ec7087ab/zajowilorifok.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/72234824360.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb20300c89---51049363473.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/60c4a510e8c9ed5c66180f90704d39b9/48489531396.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16075a6550de9f---38805084389.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/89079006025.pdfIn 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_off0000e556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 18524 bytes
SHA-256: c6d34a32efffd64220051ee3a3164e0f016cfb625c77100edee147728e2b15e9
font_02_sfnt_off00012dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD5 10876 bytes
SHA-256: 083fdf86d6de4b96ae886d700ed65ed4889fcd4b43969c683740257457e57de3

Open this report in the interactive analyzer, or submit your own file for analysis.