Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa5d6525a9a5d2c…

MALICIOUS

PDF

91.9 KB Created: 2021-06-28 04:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7295bc3028948f55573bab7424419edb SHA-1: 19fb0153849fd7db4aded373a9bf9c668ecd7371 SHA-256: 6fa5d6525a9a5d2c6a46a6288ebb04bad119a40687651d6d43a148d7ccc6180b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The ML_NYX_PDF_MALICIOUS heuristic indicates a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fad595e4e4a403f394cd8672d134ead6/wofemepamozupuwuvodoreko.pdf
    • https://amrapalispot.com/userfiles/file/damufibesupotezet.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f99a2561a5---rugatixufivifogakujufek.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57186bf8ed---babezipukiw.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/8b6075030ba76c6306e927f26a45ec23/50397031490.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160948eec6e0eb---jigekubopuvupurepajugum.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608032be82f9a---nuvuwedamopaxuto.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa709c2b24c---61156625436.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5206d090efeb6920649397efa5a1f07d/29448413150.pdf
    • http://logisticsnetworks.net/ckfinder/userfiles/files/47210360250.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/9fc71e1d6f288ba74976ecb3f61c5c58/16984192686.pdf
    • http://alimentosldm.com/userfiles/file/xewiluwisudeleze.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/jesuxevojuwugaw.pdf
    • https://businessservicesuk.com/userfiles/file/94011091928.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac274b1dbfb---32742880767.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070c88d84e39---xovulevibujivitaradegona.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/e254a8ae30e52aa0eaed8c7bb6c8221b/ruruwolukexorowe.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078b415b4c2a---fokudasonuwoda.pdf
    • https://istocdukkan.com/userfiles/files/rakosijebug.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/961d809bc72e444255e49f9bed704d5c/83087462096.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/df80b39c6655a3636a758af342e76829/84896034875.pdf
    • https://ilexgold.com/app/webroot/files/userfiles/files/xerigajenurorexewi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+give+someone+xp+in+minecraft
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c1.bin
afdf2add47d782da1fd0d0084e84071f4b8caeb0c3203d6636b64981b0515e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 17828 bytes
font_01_sfnt_off00012f2b.bin
7feb026dba9252cc4c973089d61a302a49c20ce183d330ee4efe39d2eac86902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2B 11020 bytes
font_02_sfnt_off000148df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148DF 16792 bytes

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