Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3573104733a578…

MALICIOUS

PDF

80.0 KB Created: 2021-09-02 13:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b34c111035b5dfa69d4ba744d4d2fbd6 SHA-1: d8b8d2a9453aef55e60a6efd5eb95340eddbb956 SHA-256: ab3573104733a578900d8ef95ecfba366f2e9b4930ee9c5f54d3dec7389435e6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a tactic to host malicious files or redirect users to phishing sites. The PDF structure itself appears to be a link farm, designed to direct users to external, potentially malicious, web content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4456

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://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612e39c3e6fc3---pukularalunok.pdf In PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/ro7nbreju8srjr84ibgsnujoas/443685938.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611a991762bfd---dixixumokumixotideje.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/drv22bu72r7h1jpliqmn2cg9v3/wofusuxikibim.pdfIn PDF document text
    • http://healingpawswisconsin.org/clients/a/a9/a991db820639e3552774ed9a746c1e3b/File/sitonixenonupumawipurokap.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/guduzodozotezepal.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/53835224972.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/83397393380.pdfIn PDF document text
    • https://tpk-m.ru/files/file/sawovadikatokupuduxag.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612174145a609---sipiminomomoburafusufi.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd23d41e6e---61837614829.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/55646780175.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/74185656242.pdfIn PDF document text
    • http://coumert.com/images/file/58476348205.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160903f4963525---27232277850.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/xalufelorisaxinezosuj.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/wapunezifasagok.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/bivesexivud.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861bd97f74c---visukuxar.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b416d7df1e5---vokexemulujebe.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/48168087913.pdfIn PDF document text
    • http://ccshecea.org/upload/files/gusutar.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16099b3d7d8580---2278183430.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d0f5cf209---89517657660.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/vegikevof.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/48307756860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=customer+satisfaction+and+customer+loyalty+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11703 11024 bytes
SHA-256: ef9804c40a1e6a0aa04aa3dae98152c1d56829ea58bf57037ec37a59fc853c71