Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de3ed06b8b8fcec…

MALICIOUS

PDF

85.0 KB Created: 2021-07-08 05:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1e5e37610941ee4f7b9b8004a62f9cff SHA-1: 0ae417db848e74bd8a4701dfbc8affc3d22a3015 SHA-256: 7de3ed06b8b8fcecf6064c93316e5d987f145a4c26764c037cccb5948a4cf361
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms or using disposable hosting, indicative of a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://africa-emergence2019.com/userfiles/file/79296936955.pdf In PDF document text
    • http://jjkxmy.com/upload/files/202107081013561950.pdfIn PDF document text
    • http://zkpower.net/upload/files/pazetem.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/71249716840.pdfIn PDF document text
    • http://artospace.com/pics/file/fawebamebebape.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ddec68090fd71c134ffc62931f82c723/40981128728.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607acabf5b5c2---2955023947.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/mavaxifozud.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/74848531400.pdfIn PDF document text
    • http://thaide.org/userfiles/file/91162248318.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/08e534204aaddd92e8db3e12b2d8f8f4/91048204431.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/1335867663.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/18405963945.pdfIn PDF document text
    • http://robbes.nl/media/files/gerumakineribafinunodibo.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/13387035708.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/2e3g2h73gqvkkjd01tff4ad0o1/kepakedezilu.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832b92dbb1b---36204012886.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084478cd2823---82741732558.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8bdb8da20---5362300087.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j489ebbrhlon0atrqed9i02r36/95578663971.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/rovexemezuselepipogataweb.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/ralafivaran.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+mix+pdf+files+into+onePDF 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_off0000eaba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 10576 bytes
SHA-256: ca5c868d50782dc98851bddb11813afb521362d037d692a89a65a5416ff7e968
font_01_sfnt_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 17240 bytes
SHA-256: a63b520969ff929130b0a4195a2ab54a7391492e1091e698fafe134266e32bf0
font_02_sfnt_off00012f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1