Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8213c0cae9e45a…

MALICIOUS

PDF

94.5 KB Created: 2021-06-19 16:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0067f2a3149b8f29d0b376f6ceecef2c SHA-1: a0aadba2e2fc274e6081978d57b8c372a4496251 SHA-256: 6e8213c0cae9e45a667f8000dec647526f0ceba30748e7642f00da6d587ffe1f
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-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.
  • 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://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cca1eb239a4---8770331768.pdf In PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/4c75e56254bb38e6463913e942253e10/dinelezumizab.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/92818652072.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f7ed9c2d404c03abc5ca839ebe02bac6/90444047220.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae92232cc8e---79072683116.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/jo8r2ljfbbkeii3d0gv64oh842/sakuvorinalu.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/wepusaxuwulegut.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/s8uuj8jnrakg765bv8t680ti8j/ketimil.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/f6153d87c2bc06bb268d4d5820b91251/72221184483.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/smug9j4kb0vla83olrip40bshl/fijukojamerezoxekavoxibif.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/60a5319f18e7012f2b9f138e8dc11611/fawodovazewuvedisokon.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/tikujorewusujifuzoxo.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca71c38373---19431991850.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/37061559563.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2107dea3f---gujalupejamanezuz.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b6132929e189dd4182a38adc4ea5f073/21893548662.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=happymod+nulls+starsPDF 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://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_off00010546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 2828 bytes
SHA-256: f1383d7cd59a6739427f7596f1165603adacbacc8f657d4e156367611f565abb
font_01_sfnt_off00010f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4F 5168 bytes
SHA-256: 92418c96d7696d2ee35ec76554d67c2c834542f2161fbaad1a8ca9f9010f99ba
font_02_sfnt_off000120cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CF 18460 bytes
SHA-256: d39584bfb851e6c011f0e1fd68db061af985996e956319734b761208c12d86bd
font_03_sfnt_off000157b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157B1 16060 bytes
SHA-256: 0e982b2b9fdbab2bee55ff2d2080109fd8bca659444c6706f5b3be53032b19a3

Open this report in the interactive analyzer, or submit your own file for analysis.