Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccc2f59afae6a44…

MALICIOUS

PDF

91.1 KB Created: 2021-07-03 03:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8bef19b0d8ef0015057720bceaca1f75 SHA-1: d51cd2abb6510e9ab75bb9a983f7c4747952c6ca SHA-256: cccc2f59afae6a449d21ab9dd3b652783b00cb2bf6ea672b84f49f80de74ed34
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress upload storage and other disposable hosting sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f89ab9c44f---46986047879.pdf In PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/2lgj884dufk8l1uh8porco950u/werutajaguza.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/guo004c5fjko1cpojn2h5pn3h0/6971840862.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8c974734a8d9656023b11810050ad578/jusimelulalanu.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/xoropu.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/17540225117.pdfIn PDF document text
    • http://gyorszol.hu/userfiles/file/nodipubagomajixodar.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/soninekajuvopenuriguda.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/71571742184.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/mumolo.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/fobitoza.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/xawitipu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e674639b5---66904041054.pdfIn PDF document text
    • https://curvy.tw/upload/files/20313747357.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/4330836691.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160765c024b8a5---57478311224.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/timusipofol.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/foroval.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16080342061c24---gikunamojimawerom.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/4941892812.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160baec65afbc8---65135923088.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/21893227078.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a6730f74f---52047722326.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/lesawuzagakikekimib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=reply+to+hope+you+are+doing+goodPDF 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_off00010139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10139 17552 bytes
SHA-256: e18fe18d239f889254b525b71f71797bc9ba943f7d42f7e8b8e6ccd62335844e
font_01_sfnt_off00012ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14710 10760 bytes
SHA-256: d9c3adb8b3ae17245f9291adb887afe2d10fcb6abf7e05a4449a567b73aeba7b