Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c278f3130f7d53…

MALICIOUS

PDF

77.0 KB Created: 2021-09-05 16:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f2dc02b6cc20621755d83e35f24a30ed SHA-1: f95680139982cace2e4721c7aa67eb5135942160 SHA-256: 47c278f3130f7d5369d6e13484f2376f6573d34a40b2e45202b50c6f9df74771
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating it functions as a link farm. The embedded URLs suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c508754e2ea---pakavibaxakusegaf.pdf In PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/o8tfqbulk66k1ur60ku0gr3mt5/46838860487.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/regijilak.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021072007203970554.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c9290ed4a57---fodubevujisatirov.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/60093851729.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03e26cb8a8---88695103362.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d86a59bcb07---jipelip.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/39952410806.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/dc66058ff28ebaf9c30a63d76873af5c/mozarepezo.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/v2dikjuia0lfaie9juo22k6gjp/7150575861.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/genugitasuzuzavimij.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/40e6e42cfa4c44577d63e7fd8ac9ee89/xiwelojiwodurebanaluni.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/650ce03cfb8a2aee42d6ff6a72deedfa/volububuvafupad.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/7611e37bd620b57b0d71e697142dd697/xafekerofanuzafogozomedo.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/tologu.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c078b0138---lerodovasipavokilopipul.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/4aa1731eaf96a0067e6f314ccdc9cf10/19977704192.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/refanibixejufavetomosa.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f494d5255---domixitavopofewopa.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/7441356126.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/liwami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=embedded+linux+programming+pdfPDF 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_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 10900 bytes
SHA-256: c0d94e9aac5b33260cfa15e90303ba2841910472dfdb26f98e5d6f32273be322
font_01_sfnt_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 17440 bytes
SHA-256: 4c8c54ae9ce1eb78b8db4c81e2e27544f18abeb0495d28772a1d2b91b10a5488
font_02_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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