Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e184f5bc35ba3f…

MALICIOUS

PDF

97.3 KB Created: 2021-06-11 10:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e1a3b68cecab33558b5367b57d1a798d SHA-1: 3472d68603e5f895748ebf0e3a76155b2b14d731 SHA-256: f4e184f5bc35ba3f57cc4b78dde29ebf47b2f9925a734a2466f1eb682759d7e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, suggests a lure related to downloading free hacked Android games. The numerous embedded URLs point to compromised WordPress sites, likely serving as a link farm to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://irlanc.ru/uplcv?utm_term=descargar+juegos+gratis+para+android+hackeados PDF link annotation
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b65e5d208d---bepikixomemevuxoru.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/27d21b2437602b2c38ae182d5518b75e/fedosalazuwikak.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/81234054484.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/b218f97ff9516543152f910815f7a4e8/10459591474.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b0436940c---jojirivix.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607727e6eb7af---pudekopedaxemerovuten.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64a00d2da8---27530659393.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090733586eda---32440555785.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a136025a44605f380ef2ec440cd28dc4/kutoxabitulegek.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609341f7eef60---wujanabafagulizuruvo.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731a7c202ce---21140714335.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/72864402213.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/u381ucqrlhub7sl15jn6g3crsj/96645938757.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/j7280t550m7cjohd2aru82q2ou/pafuwidibepolifudor.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/0430691a862a0512d841a5b55d9dee9e/dobexixapibidowalalur.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/vagutije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off000104ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CE 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off00011582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11582 4780 bytes
SHA-256: d1f74e274497bef14407e1d3515972b8f1125f678f1112335cf2edf53a61b696
font_02_sfnt_off0001260a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260A 5444 bytes
SHA-256: 216558e273b761dfa9fab80f733063f135b0f0282644446f17b058d6f2f57663
font_03_sfnt_off00013894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13894 12080 bytes
SHA-256: 352231c4336396673e186e12ba8da5b92e36adb6dc4e4f656d7f1364f4351748
font_04_sfnt_off00016031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16031 16080 bytes
SHA-256: bf2bb651642035a19e1b8bf5dc55c4db7948913289cd11d1f66f0c65c0fed8c7

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