Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ca66b7732abfec…

MALICIOUS

PDF

84.8 KB Created: 2021-09-03 19:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2b07f3f05c4433f3a158401436317068 SHA-1: 581d5c069fddfe3f7d685942bf4b8c43a72745ae SHA-256: f2ca66b7732abfec33d7a8325c9d89346bcab205d32069580b8b09c6a14789c2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains malicious content. The presence of multiple PDF link farm heuristics suggests an attempt to direct users to external, potentially compromised, websites. Although no scripts were explicitly extracted, the document's structure and heuristic firings point towards a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://tecnibat.net/uploads/archivos/4960204310.pdf In PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/gmhdph5m6pmijiqsuphtkdh1r6/45182069824.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/narufijuxiw.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/bovojufukowozaxadibizolu.pdfIn PDF document text
    • https://12waktu.com/contents//files/sekip.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/baxubarufutolenomerikoba.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ddffaea876b---38623963697.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071c550baef8---25270169607.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/81523202841.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/26890829618.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/zomarobaruti.pdfIn PDF document text
    • http://dentherapia.hu/files/file/72689937582.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a69868841dd71493dd5613fb3f76fb82/madorakazexulupupuxolib.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/mozejazisatof.pdfIn PDF document text
    • https://sergiomauri.com/images/file/92138959512.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbd39c526b---latedexujibonenomurivusan.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/lugopuz.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6d025d1d2---25301914453.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/midarokat.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/vujexalalafi.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/95139407950.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/49820679558.pdfIn PDF document text
    • http://sjhtractor.com/d/files/fimive.pdfIn PDF document text
    • http://sous-mama.org/userfiles/file/64855003241.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/74660293383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=yardi+voyager+residential+manualPDF 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_off0000e786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE786 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9D 10856 bytes
SHA-256: 21d82c4f343164b4a2288e3a5b7da36221db75ba229164774bc6583a255cd56a
font_02_sfnt_off00011874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11874 17392 bytes
SHA-256: 0dc70323e186e76bbe767767365a59d3c0a5f2325e4d957034ddce3f73aed64b

Open this report in the interactive analyzer, or submit your own file for analysis.