Malicious PDF — malware analysis report

Static analysis result for SHA-256 d461efd006401f14…

MALICIOUS

PDF

90.5 KB Created: 2021-07-22 09:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0ca8b2b0e2907441560ce525540f9c68 SHA-1: 9d6067dfdad1e900a48a8c748d379657e691b308 SHA-256: d461efd006401f145417d7b4809c9e5ad13e83981c4acea9ce51829dd73196c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript, though not directly executed by the PDF reader itself, is often used in conjunction with other exploits or to obfuscate malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/hidl84g3scehc40ucvl312q530/46802375645.pdf In PDF document text
    • http://voxel-avocats.fr/uploads/file/rapapidonivoxisajuj.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160982b2ed9648---99296065882.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083c330960b7---koxedot.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/217fctjqkpg48qdnpbu31382t2/22133142963.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872746ee00b---pukotulawikanazajoxi.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adf42dc198e---36274228151.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094db53b80ee---girikegonamakexo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd5a760340---nazojazakokovojuw.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/u1n94s1ftbcolnomncaeuilkie/dogaburiwobenenubiminobe.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41ba284b0c---zenozisazopuwubute.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/q1jh3vn97ftfdn6al2734r9vpr/xalexeteramed.pdfIn PDF document text
    • http://tyextractor.com/d/files/68763756574.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/89347444415.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/9tla5a6dkptgctf1m1f8nlmnu3/50047837547.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/fawimolobesumukitekikufim.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/89899886181.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/bdkapp1gm5qjq44kasjlu4irr7/bikidin.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a482754d230---tenulufunuvivepevubanal.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/21489310187.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/sosobonux.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/xufukepoj.pdfIn PDF document text
    • http://xsjprinter.com/d/files/97804587065.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606eff9236752---setonomagugiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=name+the+following+binary+molecular+compounds+according+to+the+prefix+systemPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 11588 bytes
SHA-256: 38dc00deb8e31209ce73be9926f0f5a7981e074e2681c6f0864b973dad16e136
font_01_sfnt_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 17268 bytes
SHA-256: a9934c9387c503cdc30f6fde833c22bb35cc8e5ace8d6be4b4262b115a3daf4c
font_02_sfnt_off00014141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14141 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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