Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9e1a84b88ef25e…

MALICIOUS

PDF

68.0 KB Created: 2021-10-01 00:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ce9ab9f7960c8a7f39a2b75495696cbb SHA-1: 46efe9b8070d3da6c6ab12bd7b0668c77670f17a SHA-256: 3d9e1a84b88ef25e69851c4869de7971c4e0575f3cf8b923a3f7e5774a658e7b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a link farm pointing to various compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF_IMAGE_LURE heuristic indicates it's likely an image-based document designed to trick users into clicking embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://specializzati.tecnaevolution.it/dataload/ckupload/98685378721.pdf In PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/91138564158.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/aba52a9df78cbc6d12dc3da7006edb32/25310268596.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/74751928727.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/93736997412.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/93456816073.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1614f02b66f1a9---milijena.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/zejopujodutulixaju.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/wipokijivixivajuguke.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/12235668449.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e35cee32e1---34576470904.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/berasoxolop.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134faeb02651---mabawigewazegamarogik.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b678855fba---3601884721.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/43429366d4225df2580385b4106c3560/95918601055.pdfIn PDF document text
    • http://ipceurope.com/assets/file/56144123770.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/tifupetagetazakikal.pdfIn PDF document text
    • https://eol.org.pe/ckfinder/userfiles/files/jonajedusarusuwogew.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/96757724249.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/muxefimojovepo.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161326dfa6b0aa---67079400059.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147df02a2978---42594001842.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/mijepe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+share+bitmap+image+in+androidPDF 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_off0000af40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC757 11012 bytes
SHA-256: dd47a4a9d758940913884c3e5aa575fcb9b148a3405e0df58fb232680e2ead3f
font_02_sfnt_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 13872 bytes
SHA-256: 78886b3e2888e2d6982f26ad821d92b809f6f59aadad1b1a0006e596e223105b

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