Malicious PDF — malware analysis report

Static analysis result for SHA-256 681860331ac5a642…

MALICIOUS

PDF

52.2 KB Created: 2021-09-05 10:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a2d1d4cdd1fa5be88489d50de3993f57 SHA-1: 13b7051857628d64eafed8b460e051448b812bd6 SHA-256: 681860331ac5a64290ded91c62fbcb3e0e27915b8b21651c05741cd84b3e8fb8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4612136ec4d65573ed03a5967359a6c9/50350792105.pdf In PDF document text
    • http://robfredo.com/userfiles/file/nifufegudodisanoka.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/kipisogavan.pdfIn PDF document text
    • http://rsst77.ru/upload/files/56292684981.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aadb9524c7d---nefekejuvubakifexakofife.pdfIn PDF document text
    • https://carlojans.com/cms/file/18926351571.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac95694e2b7---vopejagagazumizito.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/1e567341edbf79ead6fbaa36549ecc72/44376946518.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/4b9d56ea7f76a4742606b2bcc25ec823/81711021389.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8ec430ac548175e0c58e68d461e09400/24367672928.pdfIn PDF document text
    • http://dakmet.pl/upload/rinidumisezatotowo.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/8585742746.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099723727ad6---lepiwalajodowanavuboxik.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/pubexizotutidivisufami.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/30279607891.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160aab7e1bf26d---69440787616.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077436b414f5---33976385767.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/8840kbcal90i0eppnkfq6onv1c/48243118759.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/vibuwiwepeposisile.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/rizevaj.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baba78491d9---fekoxudomogilasesinunafum.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/32475855534.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/feb80eadf3a31b5996f828529e9bece2/kavonur.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/aefc0371f498508539041a3de963b1c2/94679739297.pdfIn PDF document text
    • http://harlit.com/upfiles/file/21257462356In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=husky+80+gallon+air+compressor+parts+manualPDF link annotation

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