Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d96dc64059e68f…

MALICIOUS

PDF

76.2 KB Created: 2021-09-16 19:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6e53140577ba51a2687d02eff61c3c4a SHA-1: 8c9bfea9ddd71724c22610e8549b035a22998c1c SHA-256: d3d96dc64059e68f16f9a0023f19e50dfaf8db928f3f9aa3626e73396769e8ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous URLs that point to potentially compromised or disposable hosting, likely intended to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://implant-drill.com/userfiles/file/wadopatibav.pdf In PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/161373e2d264c1---89843181852.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/fofibifakirekiwoj.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/cb6213c83da7783f420df9decb9178ed/9652167066.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/loradopibulagilutozavuno.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/zivawajigojalivariwuf.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/xirabudukowixamaz.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caf1aee656---xisanuwezesugikaduxudeta.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/putujibi.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/vidifis.pdfIn PDF document text
    • https://successalpha.team/upload/files/26689660170.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/javirotipom.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e5ec8ac76b846a0aa4b1437d169e8bac/62880450729.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/3hm04avfthsgb2cavtv3tfrt5n/vuvewimexa.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2a95a79afa96d6c62a956c58178f3906/bibezuxusakogoja.pdfIn PDF document text
    • http://dezis.ru/uploads/files/84498000036.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/25365635118.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/9b3307b2dfa3a3cd2d67a72e768b8712/26986583594.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/5840453687.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/woreminipemagexikesewuna.pdfIn PDF document text
    • http://wsm.hk/images/files/nivipazutive.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109140637048470.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/92537850638.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/parixanatokumalo.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/perexerokozowebupo.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/liwukilu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=wedge+loft+anglesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AB 17540 bytes
SHA-256: 52ee8ab3ae8083a4f3d91fe1b422348910e7e3e042b4829b900e4f87cae2d7a1
font_01_sfnt_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 10328 bytes
SHA-256: c8a7d3a1199b72b7f6aa5ac4816dfb7a361c6da56b00581d5f54b98612b6812a
font_02_sfnt_off00010b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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