Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e3c3b1cdb9f4de…

MALICIOUS

PDF

231.0 KB Created: 2021-06-30 10:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 69595b14da869435a12f3b8af46fbdea SHA-1: 93274dbe51091c4fa35888d313747aecbe4ec4b6 SHA-256: c6e3c3b1cdb9f4de4746cf1ca42e851ca0eff769e224020b247ffca2004776a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of external URI links further supports this, as they likely lead to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=blown+out+acl PDF link annotation
    • http://fontanarosaserigrafia.it/userfiles/file/728765171.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5baa8e675a---larewilajofexotojudomeb.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071372fcc6a4---romatedoxuxurezodek.pdfIn PDF document text
    • http://jfk1969nola.com/clients/873000/File/8323818206.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/52381429156.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07fbbf48a---3816129998.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/kesoteli.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/287e77a036ac182c41fd2cdca795572c/lejubejozulixolew.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/sonerolejobuwuwara.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/tobapipoj.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/xuxop.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/iul6s4h69bf5dnjjuld41aljka/21101741213.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072a17fea590---92163636295.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/7ff557b539a02105dbad28273d28374d/65595027658.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/fubatow.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/52211876563.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/a8ebdad43902791e8e1ed1824ca8c27e/57658779749.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210618_4E64D972F0F8BAFD.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9388701c0---lunasupolefunenenekixo.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/zamitu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606f483337069---rifofot.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/60981726019.pdfIn PDF document text
    • http://biosite.ru/images/news/file/34515807736.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/lajozamupotalowowaj.pdfIn PDF document text
    • 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_off00032d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D82 19160 bytes
SHA-256: 102c7f6a1d37ca367fbdcf88e55a5f6c7a117c1d537cea71cdc944590114b45c
font_01_sfnt_off00035fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000377d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x377D0 9968 bytes
SHA-256: b118b4902509bd4e2f4e32b65b2005f0f59ea69f8ff970bbd3ca55c4a670b6a8