Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f0a83dabaf4d2b…

MALICIOUS

PDF

131.1 KB Created: 2021-08-21 14:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c5ea16d6952cbbbe00fd72f3739442f0 SHA-1: 96fba8ccd6edc795a501bd7630fe0bfa1356e267 SHA-256: 47f0a83dabaf4d2b8c743faa6448a0e735e1b6ee6cf7c191a7096cb7ddc701f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9080

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.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa61711ac92---25271594217.pdf In PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/230a1e924318bad15e8beae988ac8412/3248350251.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5132a4f7a0---verebovonipuwekujegoba.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/50293953510.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/cf9682ac001b892a2c7be5ec1f385d4d/63250214149.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1607de07ef2ca5---71558878101.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/950745944c5ec56e821a3fcb7572c627/wobexi.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/82134975369.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160df794c25a7e---ligavobanizom.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/nf6msegjsvh4n011m53h5q8n48/90070301401.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/kotugikomatulimutupakis.pdfIn PDF document text
    • https://csodamalom.hu/files/files/35317563472.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/nirejudawixatu.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/jefunir.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62d35b085335a199fe61faf9be643d1b/29958306070.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b04153857---jonuxoxanamavikuxavudobej.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ffc62169e81f84cbb06453abfd3c4175/zetagisas.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/bavasulolesa.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/827873990.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/27679713014.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/30262367310.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/85125455145.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/pekovo.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/236b754b6f9871229c9b2956ca6580d8/2202546116.pdfIn PDF document text
    • http://xsjprinter.com/d/files/97804587065.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/72397129263.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/6ns41ic8oa0v7dcgnvoihd6si3/18464732102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=managerial+accounting+garrison+14th+edition+solutions+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_off0001989e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1989E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0B5 11120 bytes
SHA-256: 7b354ad6457a53e256fe81da5a444d6b30de16c0a477b1fbf1e2ce77b816bc7b
font_02_sfnt_off0001ca70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA70 19212 bytes
SHA-256: dc87943777c998c5960cde68487e2dd9f8d8057d71c288b87a0669f5ccbe4d45

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