Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ec1c5087aec1fd…

MALICIOUS

PDF

83.3 KB Created: 2021-08-15 00:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c1deb813423eb6dbfea631892b361019 SHA-1: 0739124a9d5c2beb822941ee8699b2555cc9f6a3 SHA-256: e9ec1c5087aec1fd48acf4ce2ee5ee50dfae4d9d2fa07dd84b7df8cbfa0fc8ba
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. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The presence of these links suggests an attempt to lure users to external sites for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pistant.ru/uplcv?utm_term=hum+saath+saath+hain+full+movie+mp4+download+filmywap PDF link annotation
    • https://amursvoidom.ru/media/files/86854803206.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4ec8fa5044---75707748099.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/b23307a02b12c45203b09dbc7385fecd/35253855757.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/sodetavovusakej.pdfIn PDF document text
    • https://lapiadinafelice.it/file/35906799031.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/98101858494.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/49438023909.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/10f28c33a170d04dae6e99800c98dac2/52341612080.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794b04ac576---pakaduwi.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/9928970927.pdfIn PDF document text
    • https://asi-filter.pl/files/file/kivosazakowugaratuvefaja.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/tarefeparobokegilebosozu.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/judin.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/24545808214.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8b6o12kpjjfa5fpq3fpms05ab4/lerixiparales.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/fesopupire.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210813105441_sxx6ah.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/terarumoxevit.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/talojelixekerafup.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/migovaru.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff4adc346d---84689707622.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/tozisixa.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/79ec5d6506f3a56416d0c6ae437a08e9/pixiwir.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/0cuj907gjmh99kra3ja0lkm1v0/piwilofapimabunir.pdfIn PDF document text
    • 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_off0000dd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 11096 bytes
SHA-256: 1b6c1d05b8262c6a7503d78f696e707c073665d0a37447a50d78a99e979e6f82
font_02_sfnt_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 17788 bytes
SHA-256: 6609e1709e063d6164bfff17e6aef6f6424d91c8b0e64abf66d2c64d1c968058

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