Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be9a35842806150…

MALICIOUS

PDF

390.5 KB Created: 2021-07-01 10:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c645c27eb450f663e9a1edd77d337bd SHA-1: 3874233be9851bb87fc5f35dd8151d2548a70cda SHA-256: 9be9a358428061502def3c95f039b6a0e4f3bbd23ba101e952a05aefd414b07d
134 Risk Score

Malware Insights

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

This PDF was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous links to compromised WordPress upload storage, suggesting it is part of a link farm designed to distribute malicious files. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a deceptive lure for payment or invoices.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/meivhaatv5nsb0oiq2u91iecc4/48551820518.pdf
    • http://liburnia.pl/userfiles/file/luxavuwezarabito.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/5b11251237704b6be772940695c10836/nuwuxuxe.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081027fc4a56---2944490446.pdf
    • http://chiron-ventures.com/chiron/home/img/upload/files/2106211051233859373dwiu.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823b72212de---50007583307.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/0jr7qgfj4du7geg5387kappvfh/34944253755.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/6cdbc5224041d4115c1233002ef86d07/mifiruwale.pdf
    • https://asset-books.com/userfiles/file/66794641144.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e879a5686---resuke.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c995a5b1196---bawibakerunorepitokutar.pdf
    • http://ptaki.info/imgekoprojekty/files/rapewu.pdf
    • http://rauvuonsach.com/images/uploads/files/pegufubejaz.pdf
    • http://ciarajewellery.com/editor_upload/file/porelaguxe.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/82062848835.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/6uldtlcvddd1p7jpnv6vvu0l31/30364195077.pdf
    • http://andrelandberg.com/userfiles/file/najeluga.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/87b8901841d2a1d5d465c5568a521acc/jelaj.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/59095496060.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5a33957dc7353f98fb9519988a7f5366/tevimujog.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/j3ge87s6uhredi5j7cj4ojsoo5/rogakup.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d122dc834c---dajugezamunebev.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72d3d5e57---ravirubenezusutuze.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=a+small+piece+of+thin+stiff+wire+with+point
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005a4ca.bin
cdd997f5a40f80ca50357dfb5e9e72e5da4da7d806ad2dd4d7ffe37f10720a18
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4CA 20412 bytes
font_01_sfnt_off0005da36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA36 16792 bytes
font_02_sfnt_off0005f24d.bin
a762c8ff5a3a38795ec4d9fd462884b17460d3cab0b25a4c4e75374e9e89b619
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24D 10812 bytes