Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfee05e10c0c6fb6…

MALICIOUS

PDF

73.4 KB Created: 2021-09-05 08:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b88e980d0b3dd43dda3233103c76b515 SHA-1: 824c2a68b8aa864496bb9e4f646a4f3173df4dd4 SHA-256: bfee05e10c0c6fb670702d652d03840e9675b9d15db4b254969ff81977c9c573
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 to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm for phishing or malware distribution. The embedded URLs and the heuristic findings indicate an attempt to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://nomylo.ru/uplcv?utm_term=lesson+plan+for+history+class+9+pdf PDF link annotation
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/68mtqcmngg667ond4ejdopiqi5/67276644194.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dff479b27fe---352018696.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/97206312336.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/lejivabibiketogavakalafen.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/df2d6kutti0ar67p1cqfs1d5k9/82216602966.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/53420650880.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/23204856839.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/lififexot.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/60717698335.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210714121633_ahz2r9.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/b1f67d8552b65f8f9b6261e71a6a7c30/41716271426.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c85de50f73d---53148707376.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/difirisasenebukewalulow.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32ff39a5f8---mesanokudenuwuvifikozake.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0429d2126e128b701c66173d1133de78/4694929482.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4448e6589b---35832425234.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/surifudejad.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/nepovoji.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/wakexexumawizedemipon.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///sotedo.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/gizipa.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ed1bf125c---5913521368.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65e157be98---zimadaz.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e9f51ef5b6---fisaxafu.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/zusetofuvamurusodomatili.pdfIn PDF document text
    • http://i-dron.cz/data/file/29291508371.pdfIn PDF document text
    • 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_off0000bb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB61 16936 bytes
SHA-256: 9de9727bf29c56a81372aa37cdcb0c1777635b96de5d9e21e5521bd2b06468f8
font_01_sfnt_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 10956 bytes
SHA-256: 64404831e1ac44a14d4ce14a10604627daebf9f1f816daef48cd2913b142aa6f

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