Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afda5f0411a2462…

MALICIOUS

PDF

81.2 KB Created: 2021-09-17 09:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ca49bae4c55959de86d0cc765c3560e4 SHA-1: 15232306b7dc2ef1218763559b39b9316d2b4b41 SHA-256: 9afda5f0411a2462f99157b07223f4a378eb67f1ec317ec9f6bf0e66f30428ff
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised or disposable hosting sites, suggesting an attempt to distribute malicious files or phish for information. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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://teleinwestor.com/userfiles/file/32267865676.pdf In PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/kibebafuveter.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/naxilopebevol.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/rerere.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/zapojaraje.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/fegiderakoxevugibem.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/f6eba5e37eb4b66d4a7030750846ce42/dofisupogegobifekumexejaw.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/63299244268.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f901cf73062d8277484496abbd77f5d9/717113088.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/sazotuluji.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/53542509703.pdfIn PDF document text
    • https://allianztc.ro/files/file/rovavoponuzogamasesilejur.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/mofagebupisab.pdfIn PDF document text
    • http://alcantara.cz/data/file/sopapagudag.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/vosesimikel.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210910140857.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c69b98b990---71689766313.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/warajibotizukozav.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/rematova.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dizowusafep.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/3775509341.pdfIn PDF document text
    • http://24cvety.ru/upload/files/49723098780.pdfIn PDF document text
    • https://12tiga.com/contents/files/nalolus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=pubg+korea+varjan+apk+downloadPDF 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_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10712 18884 bytes
SHA-256: 8e182e977c620a5160a725f9597b04593bc01a9c177b19370bf1e3ce6207c369