Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e07dd1eabd895e6…

MALICIOUS

PDF

92.0 KB Created: 2021-09-06 20:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: af6553a3db0ed53f7d2de99eb4673089 SHA-1: 4401f31207f8bd844dbfed810fa2c3475e226bea SHA-256: 9e07dd1eabd895e6af6d2d343ea8f2e36167e87a5a3d259862af475b5f6ab742
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and potentially disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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.
  • 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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/498f78d1a5886a5189a9789f49cfe81f/27997630247.pdf In PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/32578231653.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/82717981005.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/83412413073.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/h7ilsttjrn1iddc8qgur79v2eu/gadaxuretagawezoxunepuva.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/50799209508.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/35035438957.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/bacfe6476bedc31c7a97d6a6c114f632/zidefirolosagoxagesix.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607473bd6dfb5---tewopafitogen.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/wibibasivokovesagenowu.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/48600854817.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/23941436338.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/jgcj6klillnc69lhor7n3ahj12/mapotularodibu.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/xejufe.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/18ea935557bcf103c3f5a25b3e5f5206/tepumitavov.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd88499739---daliromomujinolefi.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/e0a14c04cd9ddb89e4dcfda351fa2959/61873519658.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/3d43b83523c23eeedfd7925e7cc6c2f3/32918017856.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/1ea55350309e04eb6fc215804c19853b/39161202352.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/lojinekalul.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161046157c1a3c---556327594.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/werifanusulibemijo.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/vuvanakuninepamuniwulifu.pdfIn PDF document text
    • http://keralajesuits.org/userfiles/file/79545890088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=current+affairs+pdf+june+2019+bankers+addaPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 1776 bytes
SHA-256: 5df3691c8e7c4cbc28bd9a15813b86c32f5266304be0e6eca3494cebcd22c3f2
font_02_sfnt_off0000f6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F1 22180 bytes
SHA-256: 41a720cebcb466eb8ca4f615be8841ebd50633fba4c5e2da40057a4231f86238
font_03_sfnt_off00012ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC3 16724 bytes
SHA-256: 25d57d7d1e56bb057bda0504c9e421c173d75d6dc1e328cd76e28dbe227bd2a2
font_04_sfnt_off00014670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14670 11280 bytes
SHA-256: 779e4e9eea4924b2e973d6a459deca82af92f61349e897057cb2761166efb7c1

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