Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef7556999396127…

MALICIOUS

PDF

76.3 KB Created: 2021-06-19 02:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 52576c7932dbd631bbad17b9f731872b SHA-1: f3cbc2ff167459bea2bb7c0f28112aefb897cffd SHA-256: 5ef75569993961278de59e7a6f15d4a7fde860cf955cf0342c76e9306bbb9bea
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 0.8825

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://sysquare.com/UserFiles/files/65340307834.pdf In PDF document text
    • http://habitat3.eu/userfiles/files/47737274347.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3066c0f84---desiwogetani.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/srtka7emjg5uq3glb7jkgmlp68/74445075006.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/63938377928.pdfIn PDF document text
    • http://fitviewer.biz/files/file/lusewexef.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/51c6cf2c6f6d893dde7b02340e8a352d/dinuriwibajopinelomun.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/032fd7cf2228c70ee0c0bd475b40f9a6/milogasalopotesefilabez.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087209406e73---17657102853.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/gomekonofadisenenitoj.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bb4146d12---70277778334.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160767494d4fdc---vepizuwoza.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c78dd87ef68---70196951118.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/ksk4s9v4q8r88pdmqjpkfjbp48/64083246757.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/248355031.pdfIn PDF document text
    • https://icbacademy.com/upload/files/xunupokud.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e15af1638---tedixukoroliwipilaxopepuk.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/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=bodmas+questions+worksheetPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 5364 bytes
SHA-256: 8cdf78ee68941e7b6af22769a5525e84f1acce105b9b04f567932f845fae54ba
font_01_sfnt_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 4068 bytes
SHA-256: ab9036e99ed0a39eb5a439883ffa036a91d9fa14357875ed7657bda3c8b5cb86
font_02_sfnt_off00010608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 11592 bytes
SHA-256: 444eb5a48cdc57f4291182d2c1396983c6425c8d1eda96536ad019596f7e4756

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