Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ec1daef09e69f1…

MALICIOUS

PDF

63.7 KB Created: 2021-09-14 20:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a6288773c2648f13a4fb74cca4afa938 SHA-1: af7c5c6a7c6f8b8f615363b259f5b8dc12b0a2d1 SHA-256: f1ec1daef09e69f1262acab4c798c2c28c4fc1ce7e7afebfb16ac68ff215c22a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to various websites, some of which are hosted on compromised CMS platforms. The primary lure appears to be 'pdf password remover android', suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate malicious intent, likely to lead users to exploit kits or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7025

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 http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/lasuluvukovajomowoto.pdf In PDF document text
    • https://tainandentist.com/uploads/files/202109030245327552.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/82763222091.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/s1bp4g0c1qjvp0amiqg2pco9pi/88130946558.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/93675463252.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140aecbbcbcf---28662946780.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/6290537860.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/51659398690.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/saludewez.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/92490908068.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/1925619095.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/53526454413.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lalosifup.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/88854727032.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/92341159623.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/giduxitejajoboxedosu.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109052114436653.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/34047498148.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/33edf77969edb26a14ee5ed658b6db52/57615826115.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/72240882297.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/beruzanulujuxulogeta.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210906110118.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/12489519910.pdfIn PDF document text
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/70878964028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pdf+password+remover+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC15 10668 bytes
SHA-256: 777c226ea5dcfeb40d62ad6731c231b85ea1f72f37b886c4eba05e3a1dcf03c6

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