Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c9b46f3f63b07d…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 21:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ed870990a94cbd4266bcac3dec259ab2 SHA-1: 3f4daf0fbcd35af450619074ba610c7a1ed3b427 SHA-256: a2c9b46f3f63b07ddf6ab297c8aef495350d30aa088049b6ff9b90bfb27fdaaa
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7bcfc3c3f---97201072907.pdf In PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138a27d4d058---vapepe.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/58592621769.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/gekenujodabowajulapuz.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/0c2d2f8f0c3844ed2bd6f4d5a474f246/zetuvalo.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/ratobixivaladuv.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/26834789342.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/sujukoxabotowelajuguxowev.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/54700161268.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/fiselidosisobigizupu.pdfIn PDF document text
    • http://tdbm.vn/upload/files/fusamedakoso.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/68003465155.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/36037675271.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/54269637977.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/61574318858.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/161396c7734f3e---36417650650.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/62902977975.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/10180330542.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/67014610033.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f6cf72262---22060332979.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/jexelefazesupetuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=roblox+cheat+enginePDF 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_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 10528 bytes
SHA-256: f70a8d9412da3cc2796b154ea54d215255842887633359562869de961b4f8173
font_02_sfnt_off00010956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10956 18880 bytes
SHA-256: 2f361c12a47f5f932ac4f7b6fe8aede7de7d2f7bb44aec3aae49d1657f90f519

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