Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cabc98d13504188…

MALICIOUS

PDF

90.1 KB Created: 2021-09-03 04:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 997a59099b32c67284cb7ddef2027214 SHA-1: 5d141101f84915240101cbabf7f375f8957ea97a SHA-256: 5cabc98d13504188981b0982eafbb02f520ca476960ac4630fdb43b13a54823e
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2934

Heuristics 5

  • 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
  • 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://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/tib5e9bkrepudbpit9ggi7rap6/52458416518.pdf In PDF document text
    • http://dambi.pl/userfiles/file/65688749923.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7ca438e3---tuzibepifugunifiwuxadega.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/92955952753ff4e754f3da3e179afeb5/29259273128.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/2a0uk6sguj24fm181r1nulcta4/81611965370.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/96284806263.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/sojolupoxatiso.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608905d63bc20---59503889077.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4c649207e---labipujinan.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a0d8a1b08ae28022e2918f1636159fd4/93965141839.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/b7b441bbcec36998658341130c581484/fokiferesobi.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51618814220.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/jisuropagakix.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16092e61f08730---6281576142.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/bubodavopuliwori.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/2a26055aed9aff16ad454c8a7db722b1/24996460298.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021082018504641.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/34178128600.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/36377434173.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/6312615148.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/pefixudiroropolikuxuruse.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c74757bab55---94497975268.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/45634579721.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/af315ce06e162eb76c5283c49cec0c8b/91399654174.pdfIn PDF document text
    • https://bamor.org/userfiles/file/vekudovimefidimabemixig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=asientos+de+ajustes+contables+ejemplos+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001118a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118A 20104 bytes
SHA-256: fa6e9744effefdb394f88eb014345e3ee618689ff200bcf0be2b9ea167e854a0
font_01_sfnt_off0001456d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1456D 11032 bytes
SHA-256: 501830e51fbeaad58d2f4802849c27cdf6a6709fcc40d0273588663cb018503c