Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea2dc4e92eee238…

MALICIOUS

PDF

146.9 KB Created: 2021-07-05 12:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3cf56e0bafb1df8106ec1cd6d32216fe SHA-1: ca427788d7db896511b98b92a38e648d50e79165 SHA-256: cea2dc4e92eee238bd4b764f12c14e9db4487201686bf2956027862917c81640
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable domains. This behavior is characteristic of a link farm designed to distribute phishing content or malware. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7626

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://oniceh.ru/uplcv?utm_term=case+study+interview+examples+for+project+management PDF link annotation
    • https://ahha.az/userfiles/file/42326972413.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0pgbbgtjps61ia40iembhifr4u/subatakubizu.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0b983f5ef---84828934948.pdfIn PDF document text
    • https://manenshop.com/upload/files/tolazazinujexisik.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/d24a2f6275cd24e3690eb19336cbba60/wipiretekifokamoniginesu.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/pobupezupagebukuvo.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/5h3kt5r3ogomi04385drf48re8/lifokukudutetodasakevib.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/86265837070.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/dfa23e87f5a299a92465b36d8437787a/kubajapesuxasesizazopibi.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/d5179a94c1924f5f18e634a8cc239761/tolerid.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/9mi9allc1coftmhs3v376fkdn5/63980520765.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d9fea0f23---jovilep.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/47315135972.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/79142958429.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/gebapilaparetuxobekav.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/42f4abf2320b3fb399e40c3bd0ca55f6/84040010302.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/26724536468.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/dezuzanelosakisigirifo.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/xodajuveb.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/jltj1u12pi07hpjuakfu2e8i14/lukufujoverej.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608427fe8bdd6---76149392344.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5qv2lncrlcsjh6549fpupuuus4/82289397982.pdfIn PDF document text
    • 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_off00022507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22507 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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