Malicious PDF — malware analysis report

Static analysis result for SHA-256 8984027e74e98ae9…

MALICIOUS

PDF

94.1 KB Created: 2021-06-27 09:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fbaff5a8fba7023095ab9d6fc96cdab SHA-1: fc934a1db31a45b8b11f5122734c2965622d1217 SHA-256: 8984027e74e98ae9f72b693f3fb53e0732ff7ac7a2d0cbdcc80d173e9dea6268
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to websites that appear to be compromised WordPress installations. Heuristics indicate this is a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The primary function seems to be directing users to potentially malicious external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/b8b4e630f58b02348f8a1e3c812cd908/83961467040.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/9t27unf18bj2rf5019k4l88db3/zokonurakofolegut.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/de59e6dd905c0f9d23ddf7e2fb6357a5/zekamalebiwodoregokakupob.pdf
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/bizigunopelov.pdf
    • http://fygl.net/uploads/file/271758116113.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83943b6d5---setibuwiluvelefo.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6ab8eceef---85534059604.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/8f5e550d438b22ffc788e4235a226d31/zenajedaxasimupabanogaxaw.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6642f29c11---zigumewukezefatemolavoz.pdf
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/baxavadafigusepizapenemu.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/3d7e26069eadf6e13aa51b2cc96e642e/pafoviwuniguzosawoselediz.pdf
    • http://qytbearing.com/upfile/file/41541396467.pdf
    • https://ecoretras.com/file/20570116514.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb7026bf23---rewox.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c30ac19fb0---rabifapakebiwonuxu.pdf
    • https://damsindia.org/admin/uploads/file/mibidoda.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f19ae0aa775e966421775714b0729624/buzifuvav.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/5laksa2997dncpvdsf9g84dsc0/35498189668.pdf
    • http://amctop.com/board_data/editor_img/file/202106110502.pdf
    • https://flyags.com/editorResources/file///45679353105.pdf
    • https://tvsporedi.si/vsebina/80217943920.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/46a96b90ddee59453a88fc4bc70faea5/ximego.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=meaning+of+allotropic+form
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db83.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB83 16792 bytes
font_01_sfnt_off0000f390.bin
67d4759808384dde296d6377ad7e528c2c9b97da2d59f1bfd777258081d66c67
pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 5892 bytes
font_02_sfnt_off000107b1.bin
61848e21b7d729aec811638b9aa3324c594eb9378b18af1457f82afcf040242e
pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 20232 bytes
font_03_sfnt_off00013acc.bin
9a246bf421d92d7492fe4df4a357caa736229693741aff109c0aa406fd0c5029
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACC 16500 bytes
font_04_sfnt_off000151d4.bin
b810651a1ae0530a8f44492d235a21a6de3d3de758f51d5fb588886edb6d223a
pdf-font-stream PDF embedded font (sfnt) at offset 0x151D4 10648 bytes