Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccac25d8ec5ce68…

MALICIOUS

PDF

73.4 KB Created: 2021-07-15 20:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 965d358ac068671348b39d2025a1c7ee SHA-1: ab23158d6d77df581b5786342b01f1d90b400df2 SHA-256: 2ccac25d8ec5ce68d3a2984c362a5d6c8a8785e019914c83ddaf5b34fa7b2f7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to phishing or malware-laden content. The PDF structure itself is indicative of a link farm rather than a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://aedwea.com/upload/foto/72925615618.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/8967a9426f2147a2196351d90bb9dcd6/66112029254.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160771de820bfe---diwifupodowen.pdf
    • http://elcampoeco.org/FCKeditor/file/limibupekulonebilaso.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608550e3c7cea---rutugaziregejaliwut.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/a36b9d2b932fd12e794b14eec4f4c6ec/xorazuridirid.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/40157518862.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/36nptr3h0pneae7hlhh82bk4d5/jowolosulidelajel.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160845fb6c1d21---53182345641.pdf
    • https://ntct-dz.com/ckfinder/userfiles/files/pulotovexi.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/0jg2i3o55pjto1hifpee2i5v6m/78906682886.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/dbe04dfd024112ddc8fabcc50c65045c/vojili.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7cbb96127---26610781720.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ien0s3pmje80nlmn406lers1p6/29999273641.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/8lv1pi9lvt5q84h3mtckhcpqa1/bevubawifosajudig.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8682a5256---71501565681.pdf
    • http://botosani.ro/img/uploads/file/62418404088.pdf
    • http://chinajessie.com/seadata/data/uploads/img/file/162385557320.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/3939674d07c498706ac95c454e220aa0/24278392910.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/5f8f44c57e11700586c71a315c2d8613/dufasusawekuwelu.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723099bc83c---87276830781.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76412eedda---gekusurikaxorelixo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=forms+of+wear
    • 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_off0000c070.bin
c1afd17c02036b6f8e7ae8d8aaa9c3fafa98aeb5db1427149f59b0e43da1c74d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC070 16136 bytes
font_01_sfnt_off0000ea31.bin
3a8fdb83776c002e349a89295c11c21da655098b60f283ddaf39846c526fa860
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 10096 bytes
font_02_sfnt_off000100cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 16792 bytes