Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebed2c28e73474c1…

MALICIOUS

PDF

70.5 KB Created: 2021-09-18 21:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b1b3e92bdb8ff0f46c9635b205a76aaa SHA-1: 49753f37d83bc4e733eb9baaaf68dc6cc7c54902 SHA-256: ebed2c28e73474c15e4871745e68fa1f2321f4c54e342e5c8568ab07a1686221
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the structure and URL patterns are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614247891e2e9---50305196911.pdf In PDF document text
    • http://fandimnarodaku.cz/upload/file/segugu.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/37357030139.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e13540ab0---85417609171.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/84100164105.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/b8357d8e1f9c9fdc2715417ed6a104e4/20199176175.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/pigufatujaxon.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///28194764553.pdfIn PDF document text
    • http://recviem.ru/img/upload/pagupefifelodobin.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/batazuveponax.pdfIn PDF document text
    • http://thongthien.vn/upload/files/vofovurezobituxonimulole.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8d768f07e---98233514736.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/61c8fd83a656ffa992700d8888e1eafb/matinaw.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210909_465B9DF50FF57390.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/47f9e47c780ed7fff4f05d857cae6961/nowul.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/zetago.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/datosawibirepipufadiwezer.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/1775816399.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c3170d427---mojedelamogewowigegove.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/pojubefodajame.pdfIn PDF document text
    • https://comfort8889.com/upload/files/wawawudidiwisemebobili.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/jegalakijijagajuxapafezi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=best+android+tower+defense+2021PDF link annotation
    • https://b2cdemo.tickets.com/content/files/22989426525.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_off0000b61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB61E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE35 10732 bytes
SHA-256: f7a49fde34169e0abc77eee5253a77ebef99eac638b0c601e45aaa3a9afab300
font_02_sfnt_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 14752 bytes
SHA-256: 2f0a8f446447c0f6315fb09972b8da28cfa0e13fb3801f80eee269dc4173b133

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