Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d326fd3309b98b1…

MALICIOUS

PDF

83.2 KB Created: 2021-08-08 10:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b91531f26090d111e1453f23f7e732b2 SHA-1: b243c74d5fcdffebf4ff283cef049ecba8b0c086 SHA-256: 8d326fd3309b98b1eafbc03e4a736348998e32790345385f8be366857cab248a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the structure suggests it's intended to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4722

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://moreit.ch/productinfo/file/wusarolisibapalanexikazi.pdf In PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ikmeuilr012klntgr4evq6tlce/sakudinalaxukugadexe.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09cefc5cd9---jofobuzik.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dfac1786cc2---kimegidejemagefuvazopofe.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608703e689206---27480678977.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086a767bc6dd---finuxowuxivik.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/73077120053.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/jagiboj.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/4416d62a82006c7bdd22a868d874d602/vaxinozalov.pdfIn PDF document text
    • http://mmt24.ru/files/file/13665949497.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3d369bcc5e---muwedobeforuwepepixotef.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/9775537819.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/wusoruzamarubamiributex.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/61363863342.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/af4caa2f7176c4a05e1e87ffd2d066ec/25799728701.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library//File/derowujumejawobo.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/47856163306.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/kojelesusonupejub.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1c9d79d4---bovozibu.pdfIn PDF document text
    • http://nfc.soo.jp/file/vubizuzuzagufinewagip.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071e50f096bd---16320682302.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/sebatage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=playstation+5+release+datesPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/45703af3a50b9fe58986a02e7088e971/bamur.pdfIn PDF document text
    • 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_off00010bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12409 16800 bytes
SHA-256: fc7acaffad875ef9ca44d12f532a1053f12d04b430351d4ed57685708ebaa298

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