Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbee281bf0c0af9d…

MALICIOUS

PDF

98.7 KB Created: 2021-07-07 17:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 82aaa51e9dd9d4520d6de01526742085 SHA-1: 0d0309210edf6b1b8bc806723b00b53059daa3c0 SHA-256: fbee281bf0c0af9dcd8de6d0e7f9eb3ab4e1ac5666cfcf5784c0af89ced2803f
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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 https://bdsvieclam.com/upload/files/vajudasejituvalamufilivi.pdf In PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077596f8fd35---52580067533.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/66402322112.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/vakifafe.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/394a1d4b0481d76a882044dc434b4a9a/25790210036.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/90604236847.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/d47fuav67vllupbosl5b36p8hn/72916317116.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/86070044762.pdfIn PDF document text
    • http://kaies.cn/upfiles/2105251941204250326z73ib.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ltshnnuej2tc7oiav3c29g60s2/zozupowazuvaritezovajutar.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d592f1cace---bipupizagikox.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/60951559356.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c02f95af687---mijonifa.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/dowobaveledewujerujav.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e87176fd8---wesilu.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609eca1f1659c---jefaja.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/5j85ih53gshd3ut8s4an83ddq6/91462649774.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a87f6385bd7---tugefosi.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/futipadonowun.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5c07d9561---70404977517.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/34833990197.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/3b9ec35b243ae86eb20b354b9b777314/ponot.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/11069268292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=we+were+born+in+sin+and+shapen+in+iniquityPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 11020 bytes
SHA-256: e1b7fd508153a3e61c75355a598aa024825b2c717abe5caa1a569993780a901b
font_02_sfnt_off00013519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13519 18380 bytes
SHA-256: 18473f16f03c6eb09f80cdb569cb6b8d19559afa25dd4bc100a05ec56133616f
font_03_sfnt_off00016502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16502 16272 bytes
SHA-256: f75bfb523915595c69bf7058c6c7f306ddc6513a843de2c31b1a405d42613f87

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