Malicious PDF — malware analysis report

Static analysis result for SHA-256 972a05b175d8d3cf…

MALICIOUS

PDF

81.2 KB Created: 2021-09-17 03:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9dacecfa54d30ac0a47517407c2293ed SHA-1: 361f9e98e48aeb8a4fca8e76c1568d2f2f594d1f SHA-256: 972a05b175d8d3cf701ded5b540ec485c00b42af8ae87813579fbf0b19bb74f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDFs designed to redirect users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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 http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ef525b7c1---51776489205.pdf In PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/532a768da3ff0b3871f9eac57becb474/78243200852.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/votopeganefopurit.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/95330905278.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/sageliwis.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/20598940745.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/zefowijilewejitujaxitat.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/36589539080.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/rigagemezugupepubulikomo.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10479483644.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631813325.pdfIn PDF document text
    • https://ip-pharma.net/data/files/73954542670.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/37869284336.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/78876845195.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/53491708283.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/mipanogabuli.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/boxusuzofomezagisumo.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/falotuxuwesaxagoxavix.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/xemolinoxuxoxebu.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/kodalaso.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/27279441871.pdfIn PDF document text
    • https://esvigo.com/upload/files/fokabulibukiso.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/ruwisom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=pokemon+go+infinite+rare+candyPDF 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_off0000d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 10812 bytes
SHA-256: 2bfdbf8139a5459070bedb42849ba45f131328d035392585ff91f23c29d1870a
font_01_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 18196 bytes
SHA-256: 75f35b15eae21b26d1bfed7335a9a6f041635470c06f9a8d08470f74fdc29751
font_02_sfnt_off00011f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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