Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dcaa69636b874de…

MALICIOUS

PDF

95.5 KB Created: 2021-06-06 08:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 17efe6f2d3359c2ed014b956aa1e65f2 SHA-1: d483dab7a0b3d79a8f979660e159d1a1b920f0eb SHA-256: 4dcaa69636b874de2411cd5f1827e59d92a06e5a45e261510315a198363d626c
154 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, directing users to various compromised WordPress upload directories and disposable hosting sites, disguised as a lease agreement template. The embedded URLs likely serve to download further malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8857

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://pixomot.ru/uplcv?utm_term=simple+one+page+lease+agreement+template+south+africa PDF link annotation
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871e3928262---74698432474.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791d1590644---9268293698.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/7954a71fbc4d8d61c545fe475e0ae1d3/22340710411.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/46475512949.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb2385a77b---97819223109.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/giwinafuduribulum.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/21763f506b297b4b655fd6ce3da810ea/zuxesaxeluxudu.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/d76267576d0a3496f514da502955afbd/69782804393.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/99f035r6m4666ai6me517ufjt4/funufawanepokibodap.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/77afcc09c3f16628097be8cd607aaa8d/toveponamamadifolemilutow.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/746ac8d792dfef8ba396b63ec8b177e9/4410541011.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/dabiger.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608e86afd3f8b---vogixabef.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/98336746930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14098 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off0001508d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1508D 5532 bytes
SHA-256: 732fe210b42edb932c4dd21a9717fca581112d8aa9892bc5538c3b2fbafe1d98

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