Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6b88cb77464cef…

MALICIOUS

PDF

100.9 KB Created: 2021-08-04 12:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 892d2392fab48c884a3137d39ff77c29 SHA-1: a29130818b0ab9426d58f762cb7c3a97458aa70e SHA-256: 0e6b88cb77464cef5fd2c94a1361e038f47e5b02ca49797d85bce09a287f86c6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites that host further malicious PDF files. The presence of numerous external URIs and compromised CMS upload links suggests a distribution network designed to lure victims into downloading additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://garglob.ru/uplcv?utm_term=how+to+turn+off+alarm+on+skmei+1163+watch PDF link annotation
    • http://spreewaldatelier.de/img/editor/file/dagodoka.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d84a3191ad4---vozegibanaputukudezoros.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610308fb2a95a---sununobik.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/xajisamatozenedefojemisid.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fc77ad0da5319db10091615caa2bcb7d/35179126323.pdfIn PDF document text
    • http://cortabellanews.com/userimages/75990412463.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/cbf2f5edf01cf263c8a566ac5a1719f6/78287486406.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/rusulejevavuroz.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/k476p2ou61hkea299f2mt74rd4/rukaxajoxi.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/sedojitaxixopodipasagowu.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/sisagipukure.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/rnaveih8h6t318trjjkeh1j8uv/wofajapakevosoten.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/96436639649.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/82836861526.pdfIn PDF document text
    • http://lawngo.net/fckfiles/40952096170.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/91286700995.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/c2ed56bd4d28fb7449321da9cf4b2a00/13698200638.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021072514463770554.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160edd127edaab---fufusinezekelu.pdfIn PDF document text
    • http://cartolmania.it/file/xotesoz.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/caf2d639db5f28ee619ed56c6e25084a/pitelurusevil.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/nugifuroxeninun.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 11264 bytes
SHA-256: 96837f07dcdc18482907592f7f7d6221629254c789669f36befc85c39679b163
font_01_sfnt_off00010f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12714 18772 bytes
SHA-256: 2f30e63b562a2ceb428d14a23bf30b06312b15495d111e0ba19aa1d3791f9471
font_03_sfnt_off000157d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D6 13940 bytes
SHA-256: d11e1b12e5c2991dd07cc9a2c04ef8b8326c54decd4016e400d4e73d5755c460

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