Malicious PDF — malware analysis report

Static analysis result for SHA-256 5013936c7627118b…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 01:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78e0894af8c5f426a16e40d42f4e525e SHA-1: 5cea2ef7f7f178ddcba362f92675dca87ecef172 SHA-256: 5013936c7627118b737c53d6398986e85555ca02f265a53d589690c9425646ea
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, directing users to multiple distinct hosts, many of which are compromised WordPress upload directories or disposable hosting. The embedded URLs suggest an attempt to lead users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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/16091cf6371925---dewedobi.pdf
    • http://midel.me/userfiles/file/40450499741.pdf
    • http://onlineexpert.in/userfiles/file/gomuwarelalikugora.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2cef65ac7---83427489084.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9b22227fa---75068603256.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d35a27f201---20323224028.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a6e695b5a---89012476215.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089aa8a5df98---87821424177.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb57db0532---30983767578.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/1f25c7ed8369408491f64a1eab343a58/36600612570.pdf
    • http://aci-immobilier-douai.fr/userfiles/files/xepomokofozarudifusuredul.pdf
    • https://cordovajewelry.com/images/file/85399057404.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/62123c08e9024c93e12bfa808c221ade/zamegeme.pdf
    • http://anthonyvienna.com/sites/default/files/file/17295851898.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b9091a863---xoxowuzekaxegupij.pdf
    • https://beautyreviveshop.com/newerac2c/userfiles/file/xosudubuzosuxuwisivujod.pdf
    • http://vector-luczak.pl/new/fck_user_files/file/11151642928.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a65e550644e---54752287224.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082d88535000---zepuna.pdf
    • http://onlineexpert.in/userfiles/file/61398691038.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/943d4759e73a7e0e9c6a2aeae82e4387/xiwiwozamepu.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/fb029c23ac50f6994fe57f7dae5387f2/35478756170.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16082309142d71---wuxuwivixuxiz.pdf
    • http://modnyi-buket.ru/uploads/files/sejimekavatuge.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=my+zodiac+sign+by+date+of+birth
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e942.bin
83505f581b61db5bf24d9f6ef616a0f7cf762c8180f0b1b806d8809b44522ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 19544 bytes
font_01_sfnt_off00011b79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B79 16792 bytes
font_02_sfnt_off00013390.bin
77e74f88504b78e7101babd17c6c016544d2ca7340803d748068bab02b6708c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13390 11016 bytes

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