Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03f49e61ae805e3…

MALICIOUS

PDF

101.2 KB Created: 2021-09-21 01:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 541ce3ac4dbd9c1f7b6e96752909b902 SHA-1: 93ec199a59bd6d692552ed99dc4468c038df771b SHA-256: a03f49e61ae805e38583dc1b70bcad2ff920a9cf4afd7c443d431b164458409e
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. Static analysis revealed multiple heuristics indicating the PDF acts as a link farm, pointing to various domains, some of which are hosted on compromised CMS uploads. The presence of numerous external links suggests an attempt to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2108

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://campfirewtx.org/userfiles/file/73816607247.pdf In PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138745a40d9b---jowogoxojebadenanonupe.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2efb26215---78615771544.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/gexifopebopunosodosoxoja.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/mikonomijikibuj.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/tebimipudatuvosol.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/35515798130.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/10773330725.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/25483505173.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/nofuvevafidilakivatet.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/9392098f3622b3de509a68db17a1b6b8/34348106053.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/47787115515.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d329e7dfe8---29453078619.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/tuvorafemunor.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451bd83908c---70041855221.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/sovijalutudalojofu.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/wegoxupurakepopa.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/sikodoforoj.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/42475537616.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210910/files/20210910050723.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/95039539615.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/mubiwawujatijofar.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/5678373121.pdfIn PDF document text
    • https://andana.us/files/files/85341648077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=blood+angels+3rd+edition+codex+pdfPDF 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_off00014ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CCD 18492 bytes
SHA-256: a59401e4b43b6429ba141230638fd59a381d20b0019892b7ae8d64be181907a2
font_01_sfnt_off00017c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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