Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ee6d03a4eb7821…

MALICIOUS

PDF

82.7 KB Created: 2021-09-06 12:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 393b774cf2093ad0599b7795eb7c37a8 SHA-1: 5a77df45eb980c496924f0f92082e5d775b6f8e0 SHA-256: c7ee6d03a4eb78213acbfded14c7090600eb812a2028e97f9374c25f3098cdfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute further malware or phishing content. The embedded URLs suggest an attempt to lure users into downloading additional malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70336187e6---73534943241.pdf In PDF document text
    • http://ggmtc.net/userfiles/files/71850187590.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/xoketenixo.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/29841199570.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783dc55ab4f---34312529056.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/2689722060.pdfIn PDF document text
    • http://franciscakeryandcatering.com/clients/61981/File/popegoxuligujoduwejejeli.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e529cd8b7---motubiziwazifokigugevok.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/geluropazupexin.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/aed71dc92a01b5542aa4c9b06420fe79/zivoselokod.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/tidimipasadones.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/39498267539.pdfIn PDF document text
    • http://carszana.com/image/upload/File/mamavorevi.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/pimazurigupopaxovipesi.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f79b19bf4---fodosuxopak.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/8e9o857tjuidf1qrvc7l2gqhtq/25816655482.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161156695618d3---362268092.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1d1db4e62---82196452683.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/funulibevijidaxudezowoxe.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608606ef4aa15---galazupunuwugobezupuwi.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2f192a672---nalazegurivatexugirev.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/dugavaji.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/57625307139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=adding+and+subtracting+decimals+worksheets+7th+gradePDF 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_off0000dbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CE 18028 bytes
SHA-256: 3378420b4b8dc1948f7d9d0536a02b8f2306f4601ce58b300d35e44d2ca35f27
font_02_sfnt_off000122c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C5 11268 bytes
SHA-256: 33e3ef187d6b0ae2ccf4c54fc8a1033aa7aa5951527530333707338b88d34c95

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