Malicious PDF — malware analysis report

Static analysis result for SHA-256 6133ed89249054be…

MALICIOUS

PDF

77.5 KB Created: 2021-09-02 13:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a8c02dd2bb665c0ec8702bd8ef44c75b SHA-1: bcc3912893a5056ba1a60a21896fdcde337bb4d9 SHA-256: 6133ed89249054be23ad2d7bb3c43fcb6d0cca8579f8496c3db5e99510d70dfc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing users to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f6a63f020d601613470135a391a282fc/12369876129.pdf In PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/musurevajifijudonulemepe.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/40941489771.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/85216411969.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/2a0f5022aff2bd7f85ae401a44558f87/97230897333.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/5187427409.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abe14082344---forefuganepof.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b8741e36b---46688278862.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/001f6d1a4fecf15f6e15743fb405b9c6/98456928857.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/dilabelanalasagisozuxuxe.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d592293d3---15406545265.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/67659278980.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/90030317055.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/livigeju.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/tirezivinax.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/48833445215.pdfIn PDF document text
    • https://mmszke.hu/files/file/40778562120.pdfIn PDF document text
    • https://magerp.org/upload/files/1519301879.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/boxelizatazefodakoxobafo.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/wezapevabuxelo.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e3b2de5967079e0bec7cd366a2babbc/33135432840.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/5dcc833de6991f7df8e20f74c0f119a1/39835549053.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/87494084961.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/db5a7be6741b795ef133ba531038ccb8/48849496661.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca2d93c374---26458840863.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/56580203525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=niton+xl2+800+user+manual+pdfPDF 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_off0000c7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A5 11288 bytes
SHA-256: c92263f3840a73c26b240bca0c0325d78fc1c09c79f1952d26bd7ce143de06c3
font_01_sfnt_off0000e242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE242 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 17688 bytes
SHA-256: b4115d5f0154fcd67b787f85f8fcae2d0c335b543ec3d7c18a240bbbd097832c

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