Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0a4f2c51c271bb…

MALICIOUS

PDF

75.4 KB Created: 2021-09-07 18:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e78f560eea74dfe7a4981914c88fabdb SHA-1: d9c4f293fbc7680ca0dfd4a987e63c1a43ca8c8d SHA-256: af0a4f2c51c271bbcf219f13b0d4c909b1e1d43694843009da1ed2b71cc0d0ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7568

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://ohdiabo.net/images/ckeditor/files/98872116619.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b568a9ae227---xupegumawaparukiwonipakim.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/c0c75f0fc1f20feb835786824779e665/xanotuziloxarota.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3e6123c16---walufefufubibixiz.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffa3fe86b5---solanijumuzikutuk.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/gukuwivi.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/98629069532.pdfIn PDF document text
    • https://tempegaring.com/contents//files/zidixegowoponuxidalope.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609bdc8dd0362---karibilane.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf10682ed---rabozas.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/28268606808.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/7755746201.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e020f164e5---44263374997.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/sedoke.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828370893ec---resuzefugogoz.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/pexezurapurixediloni.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/vunufanutusagugutifa.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fajonajivozirefo.pdfIn PDF document text
    • http://valeneighbors.com/userimages/febomavaxobopatag.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/70321125400.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/be7d6b6b5dc04a450daca0a10d1d83b0/dudupijodaxijipubes.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/17612013508.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c091eecef6bde089f9094718411cf7fd/72856484696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=blender+2.8+beginner+tutorial+pdfPDF link annotation
    • 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_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 16932 bytes
SHA-256: 76c411c95ba62d2d4cb9e1364743180559a5cae7cba2959e3b7763db73b8f818

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