Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea80fd7d2ee49fa…

MALICIOUS

PDF

63.4 KB Created: 2021-05-19 04:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11c709b0ad5df0bc44be7b8ded3e5a3a SHA-1: 5e078ecb1387a70303323e6120c084b3e31326f8 SHA-256: 2ea80fd7d2ee49fa8fea3178b8b338f54095e79445206be51b7c94129c75361d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The presence of a specific lure for 'Fl studio mobile guitar pack free download' indicates a phishing or scam attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://chcial.ru/uplcv?utm_term=fl+studio+mobile+guitar+pack+free+download
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91047ecbf---7509615231.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/860a00189a3cbb0888f63dc02856270a/nowumi.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4133e32903---37102678960.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a430bd24d1e---74994965308.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea65fd7fac---29746104564.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/be5fe302d0d93e4ce0814446f4db5e34/89472962491.pdf
    • http://mu-rrrc.com/userfiles/file/jebidisatedisimexi.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/3fd5c4ee5c4c11c1dd568eec6222e175/42595457924.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081bcf2d320a---migubumevuku.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160767a0f349cd---84339421340.pdf
    • http://alliance-ltd.com/userfiles/82363898582.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/d19251c4468e756fbe1f0d36e7f2be6a/77219374694.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/eb3b4097d5320a7f6d41ce615d2b7247/pujepebipor.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d42d1417b---paruvasopobenulozif.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f50b9b151a---ropazonefavizox.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c9eb988e---88692250802.pdf
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/lefupukum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddfe.bin
f3d8c507e9da86ee2c8541e2cc0c15169a7077c6373dd8b87b08e1bf75644e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFE 5608 bytes

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