Malicious PDF — malware analysis report

Static analysis result for SHA-256 c902fac9e0fa6cb9…

MALICIOUS

PDF

85.3 KB Created: 2021-06-30 03:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 4fef00974c44ddeb19d342009ae2db20 SHA-1: 5c8bd518cd9ad7f48a233d2321a6efaefe3ee49b SHA-256: c902fac9e0fa6cb95bdd5c1e83d49d43f685e6846e68c911d578cb0bb709ac9b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.3778

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 http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/0c55b3d6b6be6647458c2a9c1dc4e386/2291353124.pdf In PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/e5h8qmh08l7g6drbh7328algun/54436614204.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/a70af132f36c0087d7971f9005da8a6d/tobumuzepikuvepiwupodu.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/pcgcad28rfsmbci5d14s6j1559/69930635524.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fd110c070---53772591120.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/fafopaz.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607545338148c---28264997998.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa0dee50d1---tetudojetepopimabisumela.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c297a7b00---jozakuz.pdfIn PDF document text
    • http://hi-techfiber.com/userfiles/file/tobitaberopipomaranep.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/17133669582.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16075345b43494---sofebifavudoninopixuvu.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/toxakojer.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8f3a31d8c---kivibune.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/535ca51a4fcc6c9431bf02b4e03dbbbe/86835944575.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05dfc8e8c9---jisepoguruxivegamax.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/16316161812.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/0l22qql8nhrtl10pe35329pvlf/35701419471.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb18e3794---25203962067.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/danoluxikigozof.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/l0r1sbg7cs27cvjdgc1f12bott/berin.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b28acece2d---6013501416.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70aad35618---buwujag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=bollywood+classical+songs+mp3+free+downloadPDF 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_off0000fea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA5 17292 bytes
SHA-256: 6d26c28ca3bc3cab2c63376706dd8e197db08f1312d6087a227735a564f9aa22
font_01_sfnt_off00012c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C32 11292 bytes
SHA-256: a32ab439840ec412da6697b2417267fef17b9a7d0ce8ba1bdafc0f67760c17f5