Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee295198e53cd8da…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 10:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b57c048d00dea1277148b6f4ae635b0 SHA-1: 8c3d20f00e5975b8f697669136281fb3aae94c48 SHA-256: ee295198e53cd8dac68657bca845d1d0caf7793c4d8ec7fbfee0978f786064df
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2bc4b2313---dodiligum.pdf In PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa0171a718---60266831945.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/ef88ed3c86a7a3c5ccc12f91e35620c3/17153453047.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/4cc6cb1831378a2cd577f1f7c3f2903e/jibiparakipibujubirij.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/geguberirofopedaneseza.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/rodupogowilopagam.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16088a6d969900---75334512684.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a2613404b0---30330338845.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/49755389145.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/63644756762.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/33559305618.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/55753644574.pdfIn PDF document text
    • https://vleek.com/uploads/files/17169759320.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/puleru.pdfIn PDF document text
    • https://giasusinhvien.net/upload/files/9730083000.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/duzuvubewojugedanuba.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/ragagoliwuworepib.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/43311604641.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/29339140313.pdfIn PDF document text
    • https://digireg.nz/upload/xuduxabakavekanawodovu.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202107041515159198.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ead02fb8f---petekipuwowatugaxibuzuda.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/kubezuwegawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=metric+conversion+worksheet+1+answersPDF 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_off0000da70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA70 17084 bytes
SHA-256: 922797e85ed4a093523ba7c772436cdb1ddb689ecff8bd59329948bbcdcb5804
font_01_sfnt_off00010677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8E 10568 bytes
SHA-256: ccad6260a3457d410c18fd99334734b3150a23696899f0adbd7a5c9b2e0e989e

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