Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec730fe7b76a972…

MALICIOUS

PDF

80.4 KB Created: 2021-06-15 16:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 691274e64a429869a9b0bfdacfe85fa8 SHA-1: 7197e6d6dcf2e3bbbac10903842bc0e04ddcbeb8 SHA-256: 0ec730fe7b76a9725d1240a8899cfa850b96ea85eeff7cf6bd6fb1bf1ed8a6b4
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 0.9221

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://allytemp.ru/uplcv?utm_term=netflix+premium+account+combo+list PDF link annotation
    • https://gannat-ltd.com/userfiles/file/4765243307.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/bakodilojoz.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/37227857400.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/6999506883.pdfIn PDF document text
    • https://badrivishal.com/media/29519556604.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f70a21663b---23636268555.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab785e83e18---9592771162.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fecf9677d---60496364994.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/5t4g2n374ad8ts2mfpf6nriubm/mukuzasaxevogedepanise.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/8dcaf94df48a183fca773b6fdb8a1adc/togepixefizimifunim.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/247f79bdbe3ae89f7a8b7aad96d94344/81678856246.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/xisojodabapelujazoxeza.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/87389095449.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d83d799ed179448ee2795f2bcc938c08/xaxoluwexijifazoxepugaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011bf3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11BF3 22909 bytes
SHA-256: e6925166ed8413e77f3517d8c56301dc13ad56482a754e5fbeae577e193f3d56
font_00_sfnt_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 5340 bytes
SHA-256: ed0cf943366c2aa9a914fa65436a6bd03443fd188c28be21dd06d627b5bd487a
font_01_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 12952 bytes
SHA-256: ef7880378ac9b6020086e4265c15f12748a02c21cf276252f8afcf33f6c9f9b0

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