Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaaab9dcc1149be…

MALICIOUS

PDF

79.5 KB Created: 2021-08-10 00:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b7cd114d6e9b5b5574397e075b5f8dcc SHA-1: f86e4fe3af05402bcc107507a8f0853dfde01dca SHA-256: ddaaab9dcc1149be515903584b5e70798ef50d01254f3c74c8f5b7969a70573d
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an intent to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9443

Heuristics 5

  • 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
  • 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 http://digitalqwerty.com/ckfinder/userfiles/files/banoresu.pdf In PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/6vv7ompc83kcsc48jkcuc8o3kt/puvotitozixorafugato.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d33186a9b---84980211840.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b99a88b38---24827840562.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/232b0129953bcb1879027bb85802a444/rijefuvakikaxov.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/t0tv2pn3agn2390dq01kq7msd6/84448689410.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/nirasimixetowe.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/4d0f8a6583f13eed3efd0468561031d3/37223588326.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2db15e2573---74644302435.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dca2d33847---junune.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/96707726694.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5d228c8c0---78976180282.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52701dd7e3---91664992855.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077ea0eadf65---vulojodazojuvukexa.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/8a8a7cb12e83d2a1c02a6a36e1570c0b/33450150306.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/64077024651.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/fililefolasofepe.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/gerev.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/a3a2a2305060fdeda15ef677d6bf3b7e/35798366654.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/47953976932.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/dodasafigeletagisak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=18+carat+white+gold+price+per+gram+ukPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D8 17720 bytes
SHA-256: 43f36de92e36afb3ffb2b8b540f199395c10549cf5651f440c3d6df624257039

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