Malicious PDF — malware analysis report

Static analysis result for SHA-256 17aab43934989839…

MALICIOUS

PDF

89.9 KB Created: 2021-08-02 10:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 142b8a3d2cc11036980cd982a039047c SHA-1: e4091767588c1252f3f3913f41a0b80f0c7df7cc SHA-256: 17aab439349898395345a033bd8bcfe7fc0ac2ec51c99e4a20efdab11bada87f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/22dddb4a86e7f454b332e64a4d3c6268/pizugojitejumovapevo.pdf In PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/koreniwiwiwed.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160834eca03ba2---pitasoxekunum.pdfIn PDF document text
    • http://alkanboya.com/files/file///bikawiw.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/orl7mj18rlapjmljq63js1gh60/33213674125.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/pixanepakedu.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/89215838683.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9320ea7b0---piduwevupagelunutazu.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/56310081530.pdfIn PDF document text
    • https://baongochoa.com/upload/file/wediraligidepaluvifi.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/pabopefejejezelizovumi.pdfIn PDF document text
    • http://kopari.hu/files/file/tubitogupifevu.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/36245576813.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8b601495faad107dd1656696b3ec6ae4/87466034330.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/648890321.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7da2caea3---92032714064.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/081skail955t5mvvhs6bjnbi00/fodipip.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/4tie81t86l7s50mplc0v31jq0t/noxodirefajov.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16070efa2d9403---12874707349.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/sdups10vhdh06a9k3h730kt090/40142934434.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/68775731542.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a61c9216d2---2787459452.pdfIn PDF document text
    • https://aedwea.com/upload/foto/39721306422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+find+a+village+in+minecraft+superflatPDF 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_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 16884 bytes
SHA-256: 7eade78d83e54fe126c0e1374d71a84f13ed43984a03f50a83cf31902cd949ef
font_01_sfnt_off0001270f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270F 11204 bytes
SHA-256: af9e1e10cf6b2fe4c6dfbab484d048e89340c1821e5cf90948886b6d8327f714
font_02_sfnt_off00014113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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