Malicious PDF — malware analysis report

Static analysis result for SHA-256 8945e6012fc52a04…

MALICIOUS

PDF

226.1 KB Created: 2021-06-12 20:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ef2528c24f414ebc05ff6e9137632d9d SHA-1: 4bc9ded176eea0f2764dbbd6092d010b927437d4 SHA-256: 8945e6012fc52a047758190b2f368adf5d2c8029c4c0b3ca0101ade1ba2bc55b
124 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

Heuristics 4

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=pool+guideline+tool+apk+download PDF link annotation
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6d83b9662---pedixix.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608781992dd49---50482320924.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/5377921428.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/xibazorolidurilaxovof.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/16qmml8q3qgn71c9dr6jlfanpn/49098646636.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3cfa1ec01---37467017310.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/6e2715fb2d07f6fad16d445c72db2463/dililasirevapoguxa.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/56963195398.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/rrbm1ihnicelmlhbn613a3s6u6/47740455710.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ed5576df3---61967959340.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944db911224---risukekosu.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/53163820255.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc208da8776---9485790330.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075c1ed70610---70679309405.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e7cf90aa9---fupaxigapemejivakusifanaj.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/87500968762.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000377ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x377ED 4892 bytes
SHA-256: f9bfdb52b1f8be1267213018675f0b1b9aba8f708b3da03cc3e490ff7561c3b8

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