Malicious PDF — malware analysis report

Static analysis result for SHA-256 475cc8144503ddf1…

MALICIOUS

PDF

89.5 KB Created: 2021-09-04 12:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 03727d37366737bc947bde65052b281f SHA-1: 46706d0af2b6fcdfbb736bbf0f455a1cc427c43d SHA-256: 475cc8144503ddf1282abd931317b9a8f817c106cfec46426c49c96035d91e12
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6065

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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/05bea3be4f96a5e30e6dfb4efce98fe4/kurixawire.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608646325e4af---56329731613.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081e3b480966---govigebe.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f7691cf7436dcd94b971884298fdf762/58940023986.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff6a97b32---69990928714.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/7f25e752f4f1219ddfb4fe711b48919b/16623749365.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/31948210865.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/nazidevekomejupekutur.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/80774039565.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc48d33a03---dixupenotojumel.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16090cf1987ed9---kutavajifasovokikoxugi.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c4bea6ff3---jaruwoguzim.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f8832b1efc3---32929892852.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021051319233273499.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/53100188347.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a2e206a86---zikizadebuf.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610e8308a61f4---panuzonixowezurigodamo.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/xiwarovuwojexi.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/0u2vn3ehschqlndhhai1a1l5im/difebo.pdfIn PDF document text
    • http://irollee.com/userfiles/file/72943348538.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/7g6hbf4itrhkrhblam1256c5jq/turabufitujabunotek.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/malowa.pdfIn PDF document text
    • http://duef.ru/public/file/navikikatenakobudilinewog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=destination+b1+grammar+and+vocabulary+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 25316 bytes
SHA-256: 573a58b173e1bae413fe3bf7956bd74c4acdd91673dfccbd91831107d22a63f0
font_01_sfnt_off00012570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12570 11524 bytes
SHA-256: fad9244d3e406775ffe8e14a67bd69662b4843805ba04fe9df57daa50535bcd3
font_02_sfnt_off00014080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14080 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1