Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eda99cad2f98ecd…

MALICIOUS

PDF

88.9 KB Created: 2021-08-01 21:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5b500e272b9c25bfd0fbc9967d4cc444 SHA-1: d542369aa9a04e4934a0a857f247175c4b03afdf SHA-256: 5eda99cad2f98ecd9ade578ad491492db487193c18ae5e844981d4014ef79f86
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded links are designed to appear as legitimate file downloads but lead to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b353e9748eb64361c206ef11ea736b49/94462920488.pdf In PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/bamuwemepuselisove.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cceab022c0---40833462141.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/6n5ah4dk2gmtvgqe10j4s8tvin/febepexilavijiwubew.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cpp9ikj1bc1kgmkn21pm6ok5t5/37787782033.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c952dd6f911---84104688882.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/69363342384.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/488a92a3f8f77c8c125fedbda408688f/sazedusezowamezolinizuro.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/84455474628.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/97019159810.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/0b50u9e78lr0k3ucu3n727kdmm/kavexawataxe.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles//files/rabamalisute.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac58be22e00---86255037799.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210607_1996576BF7B19AE5.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/60gtc0aeeoml20i6k53tbq58ac/bigejofavasupolipili.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/rgtiqa8tr46r9e38vilc6enuo3/42671402897.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/lapag.pdfIn PDF document text
    • https://eric-parnes.com/ckfinder/userfiles/files/41602717750.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/lrrt0knhl3ab91advsndr141uf/tinetopa.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609415133f1ef---50873609171.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/denov.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/xovevitigokewag.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/14062033653.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae415e693---daxak.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/velewalibanenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=why+is+the+light+on+my+heating+pad+flashingPDF 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_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 16732 bytes
SHA-256: e4ea3a101cc1345cd07e84d69914543ade9d552a361435550c417c1c9fc4a532
font_01_sfnt_off00012370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B87 10952 bytes
SHA-256: 12eb645b1ac63337f8e946c1dabf083f96574e0aea90a0bab26d3748c87d58d8