Malicious PDF — malware analysis report

Static analysis result for SHA-256 0291ab10678a92d0…

MALICIOUS

PDF

143.4 KB Created: 2021-06-27 05:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42ddc7e15a081d29537b98c6c0df0682 SHA-1: e879bae314fb3112da61cff99bdcb7185df62141 SHA-256: 0291ab10678a92d0dbadac32b717bfcafee7e28d51f077a2febdda7deee4c002
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely lead to phishing pages or further malware, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/cd715fb6ad8b1ca0a3d7b27488ddc0aa/29448000437.pdf
    • http://knshzj.com/CKEdit/upload/files/davidafupegabudowazo.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaf016bfda---58292528303.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/fb9e5e5693aa4ae17d4c36aef2d4b299/nutuwigomawidovog.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/f1dce8431dab1d148cb3752408a5e630/vuzojamumodazenazobuvewi.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ta7nrpuh56rj74dosbnvrs4f7v/40395993035.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce7d877f31---59800051206.pdf
    • http://cementfeet.com/userfiles/file/gugidijalavowinedanufop.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/192fd4acd49c3970cadf2d150736ca14/63220668486.pdf
    • https://juhaszautovill.hu/userfiles/file/popunepu.pdf
    • https://bataretak.com/img/files/file/baxitisa.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40c343d2c9---mopobugatozitiditaniw.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/62db3c3cbc6726a314dfc16ee801577a/62822509742.pdf
    • https://securityguardsupply.org/php/uploads/file/mugurega.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/5v5bcguilf0cne3nbvhe29ru71/rarusenuzos.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42a1510f4d---57787882975.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/j91htbgllneqb5f7va9smb0dla/81723030506.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/bf8d1c41d2a8ce339001bdf899bd8f17/rasuguwutovasas.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160868864214fb---76980133026.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/e5c52be2c605f9b470d215101aa54ebb/25734418540.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d33b71dc7---pojepurowo.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160811c925e02a---87335444981.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/aek4jf7kqdb9vhvcb7hklgril7/31384359367.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=meaning+of+negotiation+in+malayalam
    • 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_off0001d0ee.bin
35dd06bee8b9545d6c158c1b1abdf0c5fff93b17da54563e425f6e6b51198a04
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0EE 10396 bytes
font_01_sfnt_off0001e870.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E870 16792 bytes
font_02_sfnt_off00020082.bin
02b12c54e5f5f9e07f71072867fe5abbb51f12e63d5d35e5241580357f7ffa79
pdf-font-stream PDF embedded font (sfnt) at offset 0x20082 18492 bytes