Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02b91bb04da150f…

MALICIOUS

PDF

128.9 KB Created: 2021-07-15 22:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 370714020b66eb4934f7caa8320ca8b8 SHA-1: 6003d8667a4af74347211ba961fc24f908697e1c SHA-256: d02b91bb04da150fe0c3cfbb7b89cfd620a70b00d5e942975e6cf618e7cd85cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised or disposable hosting services. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9869

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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9c33383c61a5adb2cddbd65f1e0df815/54532201396.pdf In PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/70e554cf6b71c21b7fdee2513e5ec1e7/tivirufaxulerakagu.pdfIn PDF document text
    • http://antae.be/app/webroot/uploads/file/wafezuvobi.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/a82k6qctjj8cutuk3ouk6fr8m9/1461990544.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8df69b2d94c6ce1f88d0eac196953698/xejenuf.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/guxexupujodeluputofede.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/63ef920e786fb425c1f8a73441c8efaf/55727661045.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b752e864776---wiguwuwuxulerutojo.pdfIn PDF document text
    • http://apsons.eu/files/file/57321582233.pdfIn PDF document text
    • http://e-hematologica.com/users//file/42860851273.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/65b05063a407fb563a880a76ddc72f68/33930631909.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2ae8708b6---sevagez.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/wowifofunipekimojasa.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/vemulepojekoge.pdfIn PDF document text
    • http://starke.ca/clients/84205/File/felokoraxawewime.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/30687874432.pdfIn PDF document text
    • https://digireg.it/upload/jabagerix.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/67c8b3b1d19270c8428a41adfcf14f3f/lofelipir.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1533e8099c---17945994194.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/54498258683.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747f1b5dbab---72718871090.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4525272c9154cec841a71e2bd633ee73/2740509152.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085a071520ca---zavaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=7.1+finding+rational+solutions+of+polynomial+equations+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A22 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
font_01_sfnt_off00018f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F4F 11356 bytes
SHA-256: b49afd5c42cae3ff582fa1596c298fc76de18b2a1dca37539fe99c9131d12cfc
font_02_sfnt_off0001a9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9A2 19960 bytes
SHA-256: 0cda7c185212ec1200b45b0b39ddd6907b3c68f6c8a5eada9b04ca1e645d9785
font_03_sfnt_off0001dd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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