Malicious PDF — malware analysis report

Static analysis result for SHA-256 840578c708648aba…

MALICIOUS

PDF

93.7 KB Created: 2021-07-02 15:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 938879922e5b3663261ad050ad8fedbc SHA-1: d34a321d3d6a2318e5eb9d8c8ace75a8718c1d78 SHA-256: 840578c708648aba8ab1359bb51d4730b8a46c8a6c00ea72a4d266fb51cb96fe
124 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan distribution intent. The document body is unreadable, but the heuristic firings strongly suggest a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3878

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/99d90a6a4c99c5d653f29fab7789f7a9/22875779506.pdf In PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/i2ci25phf32d6b7nlpmtqc7nk3/luvupetamupi.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078de5beab4d---pusebole.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1b4cee6a2---garazukinolobozudabow.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/aa19e3e3811ec3299547ae40b129dbca/baginifoxerigawix.pdfIn PDF document text
    • http://proxima-design.cz/files/file/duxosabux.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/3cv75gaj88b9g6ajapf2fh84db/95513532337.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c92c9d749---suzitonamosunatepib.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/ah11qh7a08627ndd5dn2juioap/14997251011.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/45011477828.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/37968962982.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/55910420158.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/58140451965.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/884134dc4350693730012f3bf09adf0d/9481738562.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/36548637961.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021711522207221.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/buxexokadikawokuvodifum.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/6a5f19a57aa08072288c6058c4739a0b/zitogegexomivagaja.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/pinigowazatu.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/givamanumox.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cc7c0a934---nuwakibekumep.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a59ad5ad6a---lipetamegizututadobebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=the+guardian+movie+with+jack+frostPDF 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_off00012e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14669 17984 bytes
SHA-256: 5acabc474a9c5661ea4708f4643c935f263e084d8f9af1de9ec3021446cc15e5

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