Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae3ae342ca9d7af…

MALICIOUS

PDF

205.1 KB Created: 2021-06-09 07:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e3a98852937837078d07ed82a449590 SHA-1: 2636ee1edfd39d631de04e6c0d5f574627252680 SHA-256: 2ae3ae342ca9d7afb22544435974efc93578d3690caca97f159e89f6cc0b28b5
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • 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://philabc.ru/uplcv?utm_term=collins+grammar+book+class+5+pdf PDF link annotation
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb06724fad0---93493085309.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a650e1f1e01d031ac534ee30997c0d94/wosasavagepanomabu.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f01e5f01dd---17342611603.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/d25d9acafbbe54cab121177f3798d679/90709064418.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/5560503574.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/88974036596.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/palafezadaralelewevi.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/33310d44967d12d7dd9d3bbd4f8d1bef/20542146486.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999acb20b45---vevejuwodafukaku.pdfIn PDF document text
    • http://cmtsport.com/pliki/timonokipifu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc147e45b8---xuxamadiboratubizawemijij.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b65c32be9cc---xopezafise.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/zezoxib.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4d804e4a6---94602736365.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/98e5218e1613cb51b02499c73b343500/64367184463.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C562 5708 bytes
SHA-256: 2735d27509c365be57c4ef37a7080d591b07ee38ef5bc5d4d4b52d6c5b159e3a
font_01_sfnt_off0002d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8BC 17724 bytes
SHA-256: ca5d82e51e38ce6f2c667d48ecc962d33bbc4d513592cc0ac966430a125042a9
font_02_sfnt_off00031076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31076 16364 bytes
SHA-256: ee201882e61a3407e77f91a2388e79af1f439e3ed9ee6d12c9677f8bd16633c5

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