Malicious PDF — malware analysis report

Static analysis result for SHA-256 f416717135ae47fd…

MALICIOUS

PDF

86.9 KB Created: 2021-06-12 15:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 292a5150e8eade7372acf39eee8a7a62 SHA-1: 5cff646e0c9ac30a8f66d4bdba1499b6202ac2f5 SHA-256: f416717135ae47fd1d0e9f82dd28a6a350a0986d64d7cea5a027ee2927dc66aa
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body appears to be obfuscated or corrupted, providing no direct textual clues to the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://ketchas.ru/uplcv?utm_term=baal+veer+returns+episode+142 PDF link annotation
    • http://amirafouad.com/uploaded_files/file/5769761141.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/54666332962.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/t3a1mn07eepjiepfc8n5f0h6h0/43639321212.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16090e11c5f194---wibugisaxamesenuka.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/72137658108.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/65777271931.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/d07b6d200f26e85c9e6bc7eee1fd67f9/39021914571.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/8773024a76b77cbd6b3084e6f2cda47e/wonavarabipiragober.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/12d10e11eb9e1b9be56b77d2acd22c9b/70976760207.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2c46aae4---87625361410.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02e00048f---58032473189.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/e6f9f35da9d5f5a04c3ecc4a519869a0/nizag.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081441272832---80497092767.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/43848388481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 4036 bytes
SHA-256: 9413b38cafa4667b7cbc9669360c3132e846cd6e7d4aa963061dd53476b7425a
font_01_sfnt_off0000efe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE6 5336 bytes
SHA-256: 58e3b7d77202729d65b15735dc11775cd7001ad432e4054f1f81cacb9909a436
font_02_sfnt_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 2116 bytes
SHA-256: 316f78c6e162999e43ccb83d429ef85c46045bf1ac59c77d169faf589ecd4eba
font_03_sfnt_off00010bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCC 11500 bytes
SHA-256: f5bb820ec78662e08bea5970e1d03d8abc41571c33161cf9571b63ce43fe2dff
font_04_sfnt_off0001331f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331F 7076 bytes
SHA-256: a16db33d939fb7edd4147c352677d1d3d808d1d877e998ea76f9936d1f30a35b