Malicious PDF — malware analysis report

Static analysis result for SHA-256 46989a1cabb19cf1…

MALICIOUS

PDF

82.2 KB Created: 2021-06-06 03:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c5351686afc89b1c8854d134e3393bb5 SHA-1: 3781f0cd4efb88cab803a8eab18163920334348f SHA-256: 46989a1cabb19cf1b66e0c35c626ee99e0fedbc7ba166e45a107932a25ea9c07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://catamma.ru/uplcv?utm_term=minecraft+bedrock+for+mac+download PDF link annotation
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad484b96e3---fonulazozerenutupa.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/33856241348.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ae53b06ecce2a5150b5a3d80397e1c8e/lebepu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a41468fa14---bedagoga.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d20a6f327---20567492051.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/64427410305c8a40ea7927e79930c2d0/nunuxevi.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1823c412f---gixapubupabuwipowedamo.pdfIn PDF document text
    • http://zzliuxue.com/upfile/file/%5C/zuxenemufew.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/10520777750.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/67548671633.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/mamamilula.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/fupunafiduden.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/c5fea0cc8ea25d0b083d6208a0664ebe/repufedafeverajupixatewar.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/b4afca2b0518a630f32fae68233a5cae/18821925998.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/e3517222fd9a8ceed4d6d5af582bf2f4/24079847498.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/27890386136.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/tonawugera.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 5292 bytes
SHA-256: ecc44ad2b1402076e43f5f2b4786024680a960ae136fdc791f29dd9e73cd3dfd
font_01_sfnt_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 5468 bytes
SHA-256: c686228affa4ae383e61dfd31003deeaf201c4a6e52605a411b54c82b05a7774
font_02_sfnt_off000100ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100ED 10892 bytes
SHA-256: fc4cce90da391ab8aba35186a5a3922078be722572ca971c24787dfbb6a69ee7
font_03_sfnt_off00012567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12567 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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