Malicious PDF — malware analysis report

Static analysis result for SHA-256 145006038578135e…

MALICIOUS

PDF

83.6 KB Created: 2021-09-05 07:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3cca65c730567808dbae50dcae916b26 SHA-1: 534dd21359c215ce3c9fcd2397712730f445b74d SHA-256: 145006038578135ef15cc27773cdcf74ac9773e4269d96973f6ea91760646d84
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites 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 distributing further malware. No scripts were extracted, but the heuristic firings and URL analysis confirm the document's role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://kitapkaplama.com/upload/ckfinder/files/71104835872.pdf In PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/bulemoxa.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7704b5e412---65661313329.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/2cb86b76fbbeb7b95a3d97378ed4895e/jigufimikumobisemure.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/6e375d2734da97e19c6f6fddc3d8908b/15449945766.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87ecc54c45---lotase.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/dogoxunifasezaz.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/8mpfkjnaouevpgpjkdqqrnenpc/dawulekefipixure.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/b14d1214cfe4ba23746234a8d9bced85/wagavipazanupuz.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/b355db084a4788a56ebdeab99a7a3e73/55791258219.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/76294541673.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/43990363922.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/23511598898.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/soduladukax.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/fawikoxivojuz.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d6076842f8---kidiwuzuwowojugunaboli.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/tulivezakaza.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/35386813268.pdfIn PDF document text
    • http://boldogelet.hu/media/titekifaxa.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788951d95f7---7988620920.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/501272280.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/3v0u2lrn1ju1a2pt2q53s71rf4/tewabevinizepesa.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/78492711749.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/kilomik.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media//81907647656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=resumen+de+la+civilizacion+egipcia+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_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 11036 bytes
SHA-256: 5c7b9f434ed94253abdcb749f99623651891af520e80db1f8102595bc7093850
font_02_sfnt_off00010f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F14 19052 bytes
SHA-256: f5bebd2f9a849b7a5cb00116b7c8604cc7fc3bba2cef4481bd3895e6dcf9bf19