Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2f46c31bfbf693…

MALICIOUS

PDF

73.3 KB Created: 2021-09-29 07:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3592d8aedc9f2bbcc6d3e6338baf66b8 SHA-1: 857264cfbb6f54d239c7e9b5537b92f7ee275e36 SHA-256: cc2f46c31bfbf6935b26a4105a1391709c7a8fcd48d15ddc229475a1e1b8d949
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised CMS upload storage locations and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farm heuristics indicates a likely spearphishing attachment attack pattern.

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 http://sysquare.com/UserFiles/files/girusejomuganulugower.pdf In PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/2896da4be027509f22d9c93254dc059f/4470638955.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090501274973499.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e7a888b97---sawugetotaverarozuvup.pdfIn PDF document text
    • http://pnalog.ru/images/file/3486162374.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/runebezokagagotoba.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/35922621220.pdfIn PDF document text
    • http://dungculamdep.com/fckeditor_userfiles/file/50933431155.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/kawarusubazexepukevajexi.pdfIn PDF document text
    • http://getdol.com/page_data/file/vupazinupazivusejesexego.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/25987f2933d120497838e141265ccb2b/46811277681.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346c7740eac---90685187347.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/evnnpbshfcs5jh9hr16176msh7/gugadetirumulikijasowe.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/57545963582.pdfIn PDF document text
    • http://fitviewer.biz/files/file/31245714354.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/89612229902.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/mhoq6ijvji9hcupa1qhfif4qpd/kekawekojidetirepomire.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/rozivagiguvexigugemiju.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/zakiduwigobomigure.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/bifisomavovipe.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/pakigewa.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/34770467450.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/xelejimefosaboxexivelu.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/jiwekigabutomakazijaxot.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/70244556201.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/39438805987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=sooryavansham+full+movie+hd+1080pPDF 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_off0000b4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F9 18628 bytes
SHA-256: 890f74c4a5d8074f6ee4566afae3868afc2ba3e47796d77ef948ecda2ffcfb77
font_01_sfnt_off0000e4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 11404 bytes
SHA-256: 12ec1c2a2778e48d1c839b0704088153a5f81e8fb1691fb7928af2cc2ee7c57e
font_02_sfnt_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1