Malicious PDF — malware analysis report

Static analysis result for SHA-256 d654a149280c0fb2…

MALICIOUS

PDF

79.6 KB Created: 2021-06-09 01:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7e99ee6d988234e5f09df58e2f053cbc SHA-1: 2177fa40562c0327dad61fff5f124b99f524a80e SHA-256: d654a149280c0fb24fe3a51d33b638c2a5bf85fee6fb68261be4af6e2f6a63cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains references to "free download" and a specific date, suggesting a lure for users seeking current affairs information. Numerous embedded URLs point to compromised WordPress sites and disposable hosting, likely serving as a link farm to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

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://cructi.ru/uplcv?utm_term=speedy+current+affairs+june+2020+pdf+free+download PDF link annotation
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16075e16f97708---34046953708.pdfIn PDF document text
    • http://emprenderem.cl/files/lopujosataredikefaxis.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6605ac210928d0e7322117a966a66441/7379774273.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071d122beba4---rerodesanakotazom.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/bhbnj3p4k49revr9p426f8mkvn/tuxisakofula.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/grqijbao3dh0l4fitub80btqh0/39112421731.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/jigojiwigokokebiwaj.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a2f5b9e3b---56136687055.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a9686c27cd852d4844ca98e7c393c7a6/faboletenomozoje.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160abda9c93d22---bipefokukowumiza.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16087d1be6655d---20999970128.pdfIn PDF document text
    • http://fabtur.ru/upload/files/nesuruwalupad.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/i7ijm604p1gbj4d134mkem1qp5/jowepadonokodatemebonakif.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/dilotosik.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/91d342dfb234c078072627d98932cccf/39895490725.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/k9kcfpofc60duqd51kibdiuno9/3224269148.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a83cd9eb365---57822921751.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609951a143507---64326685279.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c08981471---ralozikojufal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E60 5796 bytes
SHA-256: 80fd2e3822910cefdae6b87057c538edead2c1b24c9895c329d95522440e9b3d