Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f18fc33c1c983e…

MALICIOUS

PDF

74.7 KB Created: 2021-08-19 01:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 922178fee76ff50dedb1bb65eed624ed SHA-1: ee6afc28a97c80a926648800889f57bed7bd1b46 SHA-256: b4f18fc33c1c983e55dfac9258482b68bf25afab7f7de2f4002ab995f85cbb77
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised WordPress sites and disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7419

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://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab804fda04a---votagozaguxibatanufewasi.pdf In PDF document text
    • https://ooo-kenk.ru/userfiles/file/47239105686.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/58731700559.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f9054cb7---35773764206.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/70155866773.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210719121730_ig15pn.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c66d7af0d96---lowisuvonoloxatexugadawus.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/84396935362.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/sapupetuvimoru.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/29455899124.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/kowudixid.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/47755681137.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/74091a5ff6063dabc3e3e4a841669315/zixewabinebon.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/77695009336.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610091dbd57d0---83916851825.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/fafenogovedupe.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/4989897ea4361395bf4c5d7c812a2ffe/govewu.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e9967bfb5---78403355189.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/tozufiwawofexefanukileb.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65cb276c37---427021459.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/zofiwopimo.pdfIn PDF document text
    • https://blokhol.com/upload/files/nivesiguferobubejenije.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=american+english+file+5+workbook+pdf+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_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 17088 bytes
SHA-256: c877f9605abe9ba1b3952516ff9781e3f3cccfd0430f32237e79653ef3b06658

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