Malicious PDF — malware analysis report

Static analysis result for SHA-256 003a8898d8d2f267…

MALICIOUS

PDF

83.3 KB Created: 2021-08-05 11:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 12bc2f50c69560cc91a95d329c5b1fac SHA-1: bf0681460410a3c4c595d33d129c32affea0ef2d SHA-256: 003a8898d8d2f2672b51c43dfdb38b7f1f66758993e082c1fb9406df6cef6cdf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to lure users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/98152cbbeb6a6a4e9ecc65a9dba7a639/54161371112.pdf In PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/miditulixutimugorizelevat.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/juweraxumajafokojejoj.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49136383087.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ol7eoouov9a6qjo5ejeudso504/tuxewununomudomupajunina.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///fexaxaroxejepemoten.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160972a791efdf---mewugoxogib.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/73768964796.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/605ann8fqdfb9veubcatr22irj/dededafomojekadelusavim.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/14117475007.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/65924433471.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/72368698371.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c13076babc---renofemikej.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/29002a105bfc65428c508955b3e9388a/98482070485.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6b9398f3b---33328872017.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/62417950757.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/8jicv2ofmrp2pjugqmkseqtpf9/sezininu.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/e348bf5ac3f4953b57a6f89d872cd3cf/88115723033.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/kepugete.pdfIn PDF document text
    • https://congchung7.vn/upload/file/30501536252.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/11557279258.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760eb3b7896---witodumowukufoze.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/10936845622.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/81856906105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ejercicios+potencias+y+ra%C3%ADces+1+eso+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 17812 bytes
SHA-256: 858efa2d73b2c40b12f600a610b4f5b867f84f447b0db2d7935c11404d0fcd22
font_01_sfnt_off00010aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BA 10908 bytes
SHA-256: 19dba5b94adb2c9d91e3c6cf6bb6b4d758fa93cacc6ad5e54287276ae42a39d4

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