Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec40d50f7f32eb49…

MALICIOUS

PDF

66.4 KB Created: 2021-07-22 01:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bf8557356091e0f34910f43df57839df SHA-1: 567af51a58abc0aef8c20ee1b83af29148e3d439 SHA-256: ec40d50f7f32eb494e2c759231d8d2478760fe3245cb3144af467a11a2320db4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous websites, many of which appear to be compromised CMS uploads, suggesting an attempt to distribute further malicious content or conduct phishing. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7836

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://bsa.by/ckfinder/userfiles/files/togewofiki.pdf In PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7cc46ee4ae1f280bf2a181ddd8c26503/24883406657.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/fitom.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/6224562824.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/adc37ed0510a21a42eb2ffd86c562175/79570763380.pdfIn PDF document text
    • https://ahha.az/userfiles/file/73250597270.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/jajilusupapufagumudalub.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecc632542c---daxazukatojenuma.pdfIn PDF document text
    • http://lowchens.org/userfiles/file/49904750171.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/wekapijiwu.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f14cb29651---dewepovedifo.pdfIn PDF document text
    • http://drive4smilesquebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/denarovupisutikonoruve.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/tipixagiseviti.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a01975a00---70852800496.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/wipix.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/wavajufigeveputukotavo.pdfIn PDF document text
    • http://kfbi.ru/content/file/88290523371.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-2/20210502214329919686.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/a803e79cf20bc4dc1d3964e8585cbad5/6309342607.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/gigivutotadosizasumifub.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/07/02/35268673002.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160e78ea03ab62---80996882996.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/rozaw.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda111e76f9---77314109119.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084aa80ca2fe---17709170035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+market+development+strategy+with+examplePDF link annotation
    • https://mediaget.com/userfiles/files/wekigotegawem.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1