Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca3f7f19383dd23…

MALICIOUS

PDF

78.7 KB Created: 2021-07-01 10:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e86c97137d12172a23222e799405d00b SHA-1: 4c02b70a4981cb5211e734d0a7cc1479658b6bb0 SHA-256: 5ca3f7f19383dd23bda69160c675415a66dd83922176f99a588a1883ffbd602d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit user interaction via T1204.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923165ec4b8---47263431443.pdf In PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2f9e73b4712fc2764f43d4da3e8af80/vilam.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/20998955721.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/4ffc2eb760f4afb353e209c61cf10f74/55813605757.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/47995351761.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608088a1bf686---5877573482.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/puparesux.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094b412cc788---67421953120.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/56195647047.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609780fc589b2---88671761696.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/jerujezokaliga.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/887afqpv5a1bfm0vjni5s7s9ov/96760431144.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2f76e4e77ec7bb16ea8ab4507aa9844d/31088856485.pdfIn PDF document text
    • http://terminsk.by/pics/files/xiziwefogonufut.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/eb12fa8b4f1a57dc62cb366304f4899a/potal.pdfIn PDF document text
    • https://emmaushuis.org/pages/88378225696.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/4923391278f57254accd22a9403c8bf3/fusujupe.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091e56a23312---56351692126.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078148f27b0d---29588842530.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/abb9788819e5ecd8fdbd3def4d1b3cf0/fexejizezado.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d1b73c457264a44a4b9fb0bbb8e802d8/2095789659.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/jifodefev.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jubupenapulaganepogafo.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609461cd9b7ca---mepufosasuniwukidowakozed.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/8ad5611718d480763a4cf3e13f6e07b6/japubujoxug.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/84a6d87abc988aae4249a43e003fb50f/xunoliwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=criminal+justice+policy+analystPDF 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_off0000d099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD099 10912 bytes
SHA-256: 2178ab718503c115d44400396bfb7caf76bf3183152f2510fcc231354ccf8bc1
font_01_sfnt_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 16704 bytes
SHA-256: 52615e3ad184d208c1c825ec3df6f051a5c07fbc4246703f2d2afdb8525e4671
font_02_sfnt_off00011560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11560 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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