Malicious PDF — malware analysis report

Static analysis result for SHA-256 2417e01eb8b6ccc4…

MALICIOUS

PDF

78.0 KB Created: 2021-09-04 23:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 81d1fc69b8392e8ea73cd3aeca775600 SHA-1: 061a78d157f6b8c29f18f08dd0e7de2f3aedd910 SHA-256: 2417e01eb8b6ccc4fb2d3307e6ebe456089e3cc95d9523bd372cb6b02201b5a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/kjmglqki26p97eedriuafs14dt/fakuwomibitoporamokinali.pdf In PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16108c3f4087bf---40374506338.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c997c76622---89340465516.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2444bff30---29894369064.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/432e5ff2cc5840a5388a68047aabde5d/logepefabe.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5d1a89375---mozisabududisetoxurego.pdfIn PDF document text
    • http://ridendo.cz/files/file/61280302612.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/97994970419.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1625157211.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881b900053e---85564195813.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/52007604884.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/22841365086.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ac86fcf4acb8ba1faead0a64156d5fa4/kilazorudanixowepakito.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/zerunepekemegi.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607483707ee55---sesojavakago.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/fezawusaki.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/26d943748c0ed3499eb78b10099ea739/42574269151.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/xidol.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/37869760336.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080f199336fd---4821861207.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/vozepukabujedunex.pdfIn PDF document text
    • http://beijingteye.com/upload/files/punuzuwa.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210705224307376.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ncert+class+7+science+text+book+pdfPDF 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_off0000cc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 17448 bytes
SHA-256: 68925ba57dabc6da5852317189e4787bff5f13a7c1a508c6bdc9b61f924898fb
font_02_sfnt_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 10976 bytes
SHA-256: a2df191452f0a1b90be8632468d6ea52f2969a0c8f6eb815e6834e8211592612

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