Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c00ba4aa4264e8f…

MALICIOUS

PDF

93.5 KB Created: 2021-08-29 19:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f32e4f7eca3dcc74b50d487eb6101231 SHA-1: e177361f518466c66194e90b8edd8c10bd667f51 SHA-256: 0c00ba4aa4264e8fac444efe778ad7780e0f54fb4e0e5cfe84bcb0781aa96f8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate an attempt to redirect users to potentially malicious content hosted on disposable or compromised domains. No scripts were extracted, but the overall structure points to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/2q2apoaj2ps9vvejp77upv8qml/34271193943.pdf In PDF document text
    • http://work4shop.cz/userfiles/file/3384469989.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ep8plccen6gd0dkoudtp2vduaq/zepebakugisoka.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/diwifimibolitekumazuwip.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/bakokejisiwujezipiloraz.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/62501785605.pdfIn PDF document text
    • http://billsky.ee/files/file/92783609647.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/072906d46b9619e6f5041178c40d3272/3836832781.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/bosotaxe.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/bozukuburoraruvajuw.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/85291603353.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6bad0be78---revisuboruri.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/80826956916.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/46645241015.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2f3724aeb893c7bf9188f54ebbbfc6c/71216224695.pdfIn PDF document text
    • https://cape-electronics.com/media/file/22373734940.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57e5a8185b---86601429212.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/51114501567.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/2f4bf7000bb759cf85c8bd76156a3065/zaxisojemavizuj.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/delezadadutuginebavud.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/4t5jtj3pino6k3tl2tq53uj7uc/68980907074.pdfIn PDF document text
    • http://954move.com/clients/4890/File/pivabezowarokuxikabiruke.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/76504859051.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/rorujisunopetinokuwawolan.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/90630875226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=best+red+wine+for+heart+healthPDF 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_off00010805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10805 10592 bytes
SHA-256: 3999d97e8d8d67716ce7d49b1006bb4f928a72e9055964b0d1d54d344622c7a1
font_01_sfnt_off0001203c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001384e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384E 18488 bytes
SHA-256: 3fb403fc1cbc44cf2b246498992c07de3a4c25aa86967479d87916a2edcdb537

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