Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ef0206329d620c…

MALICIOUS

PDF

85.6 KB Created: 2021-07-02 05:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9e4f2d7b1b2d939ca6250fedae8623d4 SHA-1: 2d3760c781c850da527534036d516f42e3d595a2 SHA-256: 65ef0206329d620cfde0d65b139d5126860e6ee53fda1aa2b47ea286275eda9b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. Heuristic analysis indicates it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087f5b789d1f---zujukilon.pdf In PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4f00edfb5f73eeaf028406e6fb75419a/77073106036.pdfIn PDF document text
    • http://1982thsreunion.com/clients/a/a8/a85c6617a93da1462bf6c3e7dda9c043/File/wojumadop.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/mulujamepu.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f845dbe307---85357518921.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609d26b285d88---lokugovujiwawiroxuj.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/zupebapasexo.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/92854618752.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/rozedojesibopojel.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089d45a37450---wekiz.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b41493df6---70171728689.pdfIn PDF document text
    • http://www.heksan.com.pl/file/dolodu.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/d52f09cfd4b2f7c32763491842650ac3/gizubazumapikomixagakuva.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/416d651864dfd14268a8edf6ef674803/11173557274.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/zusupepelodajewibilologar.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b650b832782---9114653974.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dc610c96c---benilatefelizam.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b643aac8381---56919411291.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/kenitufokamela.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fedc5423d---lupiranemabesetavi.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/d37dd8ac9aef7a8419dc95fd0eaafb3a/resakofimugolup.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/282e10d062b71b2c09809fec066fc2e8/buwumumozoxadevimawig.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/62581038365.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bible+verses+related+to+naturePDF 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_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 16788 bytes
SHA-256: 83a9470f304e8d7b75020ab5dd66113c15cbf4b0eeb49173e1176d77cf00a050
font_01_sfnt_off00011894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11894 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AB 10600 bytes
SHA-256: e104475ad08c9cbda23b2df8122444b49f3547ee18ec6e1ce0a56d954fe9ea39

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