Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0e4b9e929deba5…

MALICIOUS

PDF

70.3 KB Created: 2021-09-12 01:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cc7817f2ae342e0e7aac16194257f506 SHA-1: 6d5c7135862cbedc6139c7003dd9d6fdd9829f6f SHA-256: ea0e4b9e929deba5edfa4b8ecc44a03e03ccfc7b3f79fa1dd10b47d80f421766
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. Several heuristics indicate the presence of link farms pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier clean score 0.2381

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8d7361859---45891904504.pdf In PDF document text
    • https://detector-billetes.com/Imagenes/file/bovigugenog.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/dulafovo.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/wuvegunivukolivijivofada.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/84716363134.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/povevonibunubituruleme.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/kanano.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/wegaxebukoledojunudigi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613696cfe2455---xevozaresazon.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/85502163424.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/24055962616.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/ranedemopatabejasi.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/50317964933.pdfIn PDF document text
    • http://gkz-crimea.ru/userfiles/file/54143775768.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/80960922870.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/28540070604.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/39356391199.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/54377713936.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0becb8dd4---42074974774.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/38590673317.pdfIn PDF document text
    • https://schmitz.cz/res/file/56806400048.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/patasixalukovi.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/32408161355.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/bolaz.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/42924027263.pdfIn PDF document text
    • https://totounited.com/contents/files/vitusapomafolemibirajefag.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/lusakufiweripofaxot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=simply+piano+free+apkPDF 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_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 10532 bytes
SHA-256: 7b567f31448fd242dee717c232963a5f269e00fb4f241d7a2c2247a591c503d0