Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f63829a724cc60e…

MALICIOUS

PDF

79.0 KB Created: 2021-06-27 01:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0e0177f8c8047e535a9050b54c171a77 SHA-1: c58f20b38fca81cb3a37aebb698542b6856a08c1 SHA-256: 1f63829a724cc60e62bb3d8bb3e07b5ef3de69a8790028416079f99141f5190a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. ClamAV also detected it as 'Pdf.Phishing.Trojan'. These indicators suggest the document is designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf6e2dbfe1---getovitajutas.pdf In PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b085809c323---82698537157.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/442e35e8fa023376b4ec87594e93ee99/74786102544.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/jhojnsbk8989mcqu32rq2mnug5/52808709237.pdfIn PDF document text
    • https://ptogel2.com/contents//files/lamekakazepujanerojufen.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/26464555963.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608677038d713---zetegululegagesobek.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/8bq3tnudaf6n273su13q8c5r1r/podesevuzajitesepijupita.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/19214156952.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/dudivekejixuremikivez.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d1d5323c8---196302718.pdfIn PDF document text
    • https://argumentua.com/i/file/99913954398.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/onav57b6129lf6p8lk9df3ippu/zadim.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/mubimaxajuvomafi.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/60220020269.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ob4keuqti5g70ethtvo5evm4k2/22374894865.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/d31f1db752043f76832ce1490f615acc/5197472656.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725f844efe9---wixikev.pdfIn PDF document text
    • https://ubranni.com/uploader/files/riwerupep.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/muvigudafitobafuted.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/elnctk9u375bqfpo1s3lnh1suh/54116923489.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/8819985176.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4182605d5---85426803151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=example+of+natural+obligationPDF 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_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 10860 bytes
SHA-256: c5c96115ab6bfdf268928bdd475dd5a7f785cf69bebdc37e5435990c0f6ecdb2