Malicious PDF — malware analysis report

Static analysis result for SHA-256 14867fae62d45d5f…

MALICIOUS

PDF

97.4 KB Created: 2021-09-07 05:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0abed9c7a0fc1053d59078238a203fe2 SHA-1: 8e57c78992ce7fbe712b57014e503ab7999e2d4b SHA-256: 14867fae62d45d5ff390f1f452612c78a14631b0a3958c590e71b0d71eb189fc
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 ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://catamma.ru/uplcv?utm_term=convocation+speech+pdf PDF link annotation
    • http://ellenia3.eu/userfiles/files/jaliwekuzobogikaripo.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a988a9840f---53631858930.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/fd846be5947de4fd255c8f2b05d9460b/12929560056.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce1f954585---67651501930.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/xelazunigiverepeb.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/01f11a1bbccf19b7a2875a4b7952f67a/xiwufurovigiwegawomixolut.pdfIn PDF document text
    • http://93564497.com/userfiles/72213495895.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/84553ca7825f8ce533ec2b6f00707a48/40725834986.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/47785523679.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/rasose.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/92207022006.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/93421695781.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/vubewawelori.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857aa8d04f5---23472156968.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb038f69a4a---renonudozojoludigewajos.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/0bade8802a71abd00ef688416fa9a58c/witesobesi.pdfIn PDF document text
    • http://masonhn.com/d/files/pozakasiwebowawem.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/40899672579.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/limirovepaf.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/banubulobananujusaxedukim.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f015972b67eebebaab5cbb0f4de39ccf/49622709681.pdfIn PDF document text
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/vizotupusif.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb81e8ffe2---97629486718.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/tegisugarasi.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/b552517bc1070ef053de5f1bcf3d2902/sevoz.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_off000116c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED9 18616 bytes
SHA-256: 93b29630ae9cffbf9206185689baad388079780a140fac5e55206a33d16f9bea
font_02_sfnt_off00015f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F44 10668 bytes
SHA-256: 71a856fc567651d69a77be2e6b7396872b4420ae208fd792311b836c4c280248

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