Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e8b5b4d8de4195…

MALICIOUS

PDF

96.0 KB Created: 2021-08-20 17:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: dd1b28a9229e3be1b1795a339bac44e5 SHA-1: 1c17f1e2b00e6648d3eeb4fd8ad2a0f301e84c47 SHA-256: 80e8b5b4d8de41953a4f23ab17235bc48c93ad5f306fb7542839008a46e3d12a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9460

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://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/9q1nrr8e5j454socpsr5vd6a27/24973880126.pdf In PDF document text
    • http://studioassociatoemc.com/userfiles/files/23429087989.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/13061780627.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/2ac3502ee4b1fca992b2dc74efd2d152/pemipa.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/dasufano.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/77908095186.pdfIn PDF document text
    • http://nessium.net/userfiles/file/8100017228.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/130fcfaf0e0362a83fe00b1edf168c29/89791419786.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/69900249811.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/88679461396.pdfIn PDF document text
    • https://aedwea.com/upload/foto/rexenibivawonabutotazod.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1d5277a70---74914636955.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/5j5pp489dt308amu2kte38jjkb/tatusamefulinil.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084389e81a08---72964944647.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/wituzuwabetolif.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/67179191896.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/37150104602.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7k5o8gckve0f331dgbhjt81hfn/30134919366.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/80535276707.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/19771493421.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb18de2d41---tewirojilatazeganigoki.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/farerowu.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/kupiniburonadiroxotugade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=dragon+ball+z+mugen+edition+2010+free+download+for+pcPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B61 2328 bytes
SHA-256: 97ec669d954d95f7f11ed1d7b8736228109f07c966ab3d6524b1aa4964609446
font_01_sfnt_off000125b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B9 11476 bytes
SHA-256: 16f5b800bd137397930e910d3aded47721673828bd89a5e87883bf2f50a737b4
font_02_sfnt_off0001408e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1408E 21100 bytes
SHA-256: 7ce6e69ddc1ab5a530b3674093c0d30627c024aca110e52c1933cd4d19d7cc7a

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