Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6068b036b22ec2d…

MALICIOUS

PDF

90.6 KB Created: 2021-06-26 00:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 35d9763f2db1a906597eaee4fb5409ce SHA-1: 89c0b9fe4cd5dd4861f4d53f626176331394444c SHA-256: c6068b036b22ec2d3bff8d972018c361e31ac54623577633e698613cbf63336c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded URLs and the PDF structure itself suggests an attempt to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://huntic.ru/uplcv?utm_term=64.2+kg+in+pounds
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/4c3ffdd4b7cc78d2fcdf106325c27785/62036530548.pdf
    • https://damiel.eu/userfiles/file/53797197397.pdf
    • http://growlink.biz/userfiles/file/34590009792.pdf
    • http://chinalabware.es/d/files/katupunopatagegovis.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/3b05039bccaff25f175d74ff367bfd07/wejikulamij.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/47ia7qi8g5fb0bb4mkq7gpdhg9/mumowa.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/j8mpekijs1b6516cbuss3guh3t/muzojetesatemekugotobax.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d01e5212195f4d69d75753d0364ef4ea/85311976931.pdf
    • http://ahkkpcm.org/userfiles/45403538195.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bb1cb61ba---subowenasazobilolutun.pdf
    • https://istanajpdua.com/contents//files/31510740655.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/045a62h3b90fhjjlat1aukqn9b/27492143046.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/5jmrk0b3gvmmoh9nhmpn8j5235/62227014250.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160929e11220c4---53418462920.pdf
    • https://ghnservizi.com/file/vudikobigevefufubag.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073f45a4334a---wirumopejesulefoleretuje.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/e421c6254b6a4c550f8b2a53615c5422/pefuretegukoneg.pdf
    • http://www.companyforte.com/imagenes/editor/file/49896916756.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbbe4c94db---35474881438.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/v3jfmdj9fbgds9bgnq2pnu3jil/30595596692.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/cb34cdda076b657e5059e23bddcc860b/53163124335.pdf
    • 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_off0001008d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1008D 16792 bytes
font_01_sfnt_off0001189f.bin
b2ba178fb6d0d333ac18b4f0a5ec124a4fa8abf25007c5cfa7f89d5fa9f0673c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 17256 bytes
font_02_sfnt_off00014590.bin
d6f4bc7bac0fa096a21d934927569ed556aaaaf7b480648ec7ad943a95437f0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14590 10556 bytes