Malicious PDF — malware analysis report

Static analysis result for SHA-256 008bfcde0bb7230b…

MALICIOUS

PDF

77.4 KB Created: 2021-09-04 11:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b20f49cf4a3e35f412d648f7c70c28e9 SHA-1: 967571f921583582c0fb0f037b60cf7d9d756322 SHA-256: 008bfcde0bb7230b91862a2d53c8c882e7f9419f264707f0c9e48bd96235ef5f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features multiple link farms pointing to various domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to obscure the final destination and evade detection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/20fb015d4597578cfb152a1532ea27be/24155092213.pdf In PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/10389913158.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57164e280---mazofis.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/boduvigubeso.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dabc1cd61fd---56469493186.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/gubifatitiw.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/39218197114.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/dodofibonezezotelefakulo.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dd339dee665a43ddc6a5ee1f747b4625/bijosorisasajakibegi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/004c45ce107f37a1ea5495305ca98fca/33848253561.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/30635461412.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f09cdf094b1---wobovelelijorabugujenot.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/78207684745.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/5d72683bc1babbc09649bfda66b06299/6294855937.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/gelilomusuvutudade.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c69157c7c4c41f1a34b1e6e524717ff9/zukurezonijufidogina.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5af587dddf---14380743338.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ff3b3c71b---82594709859.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/kagakidufexi.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091077674f30---36435201667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=polaroid+snap+camera+instructions+manualPDF 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_off0000cb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 16952 bytes
SHA-256: bbf3bbb9319b919f66b298508e884e2b0192b34f01b35dd906d27ce3b67f2b8c
font_01_sfnt_off0000f73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 10776 bytes
SHA-256: 1c3dc9e2b2c20f787a2f31a9a6bde7c1ba5da42277920b2d74b73ec60f08c16a
font_02_sfnt_off00011003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11003 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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