Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef3471334e0d185…

MALICIOUS

PDF

62.7 KB Created: 2021-05-27 17:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b058c9dd7a38d32ee58995243ee2c2f0 SHA-1: e7295edbad695fe0c34f0fda07878fef49533a4a SHA-256: 0ef3471334e0d18540b137ce35e6f4c0ff7b27cde611398e88b2c24d5dfddadd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.9951

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.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2620c765---varoja.pdf In PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/400edebf042ba1049ea4140d60799d80/49518879897.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/3b1e2005a2acd144a1d5a947bdf2d8d4/58816114371.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/37909423382.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/84890521299.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/9eab508a58c62ddb9adaffd1ba0897d4/50757623062.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/aaa68e0914494b5baaa9657a9b577311/xofuwipaxofuruzegowuka.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/zijagumenetewin.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/1ac7d05188cb8d6c17300e72f178a4db/14136206964.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/6dd718f593f7d672928d712d54f6349f/93347507600.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d249f77388---44772488308.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4kt1k69ik4dilih65b1a4arka3/23535809881.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/tuxasibadumekegoxa.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/007a9177c4ebaf9b27d398a368ba4e3b/10397165573.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d47164e39---84507556491.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bbe0e4e15---wowojasoto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=kathai+tamil+movie+download+isaiminiPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB5 5092 bytes
SHA-256: a0db77f8675a9a7d16dc850d9126c7dc4987ee5639a8e2e9bf9bb6bbffd39f97

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