Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f4d38f80e80f4c…

MALICIOUS

PDF

84.1 KB Created: 2021-09-11 21:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 26979b5e2a48a49ff13da67977f50735 SHA-1: 7d62a4a64c11340a50962546aafeba9bfb9ee3a5 SHA-256: 96f4d38f80e80f4cebce522e1087e8bc28b462c70a83f11e47febe0db9dc5a39
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities or delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=conor+mcgregor+notorious+streaming+vf PDF link annotation
    • https://kompaspt1.com/contents/files/gijuxuguwurabumumizabo.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/33834001690.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210909160853.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/74068032578.pdfIn PDF document text
    • https://egyediajandekotletek.hu/mvc/userfiles/file/jesedifatibefu.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/ruxaxi.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/kanabogazexuz.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/wixadilabitanisinuku.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/48146138176.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/75210429376.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/tujalevixobugizabiti.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/89379484665.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/94163904251.pdfIn PDF document text
    • https://123natura.com/stockages/files/zufirezewid.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8447e627e---26618066953.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210909203553_wf631g.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa73aaf01c---budinikod.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/10466952258.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/b72db49b4e998ee2201ae6a44f0c4a10/ninonobujodelapuxofofege.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/14567778460.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-03/images/files/xesoxusepes.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/jajitewatasenolatarezot.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_off0000db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 21160 bytes
SHA-256: a7c289ec0a19c0b667db7aa9cc7ebc8ed47d9e58115a853888bd0c65e7c10c1e
font_01_sfnt_off00011344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11344 10828 bytes
SHA-256: 41f4a6365d4ade0c1b744e3eae6144a2596d814c063d7691a1384bbeb3f71595
font_02_sfnt_off00012c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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