Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede1aae4291a3f49…

MALICIOUS

PDF

83.4 KB Created: 2021-06-13 13:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ea2d7a32f141b8673564bdf28a34c664 SHA-1: c21b191c428d870cfde6a17f7fa7d203bca1df28 SHA-256: ede1aae4291a3f494aa14068b9368c2b7635948b0980f969db70dfd8bc5ce13e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm for phishing or malware distribution. The presence of `utm_term=play+milfy+city+online` in one URL indicates a potential lure for users searching for specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://krisoc.ru/uplcv?utm_term=play+milfy+city+online PDF link annotation
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be011bc0914---wovegebix.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/amlhb4d30ofeiug5p72vtaq90b/vuvizodo.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/zudunapanakuvebuxurugixo.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bc7f3bff1---15536961932.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/45671268147.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087190391325---metax.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160900838a943f---libelezinagesofaf.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be86366ce67---15131847537.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c477d9d58a6---39503704572.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/7875517299.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/misudigebasakigaget.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/d0ee5cde981885e5fd0aae8057455545/zorawu.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828ee6c9798---wuzanowinexilen.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/84795720553.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210610/file/nemamamogemirapudewunipe.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/9ujk54lb3of07uadvrik9fttjc/63218044514.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a819891d67d---84069289349.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606efaf9bfacf---sejonakifabesixibi.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/5eomfebpjcevnpt6j93cirq745/kidugonuk.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160774a545ca35---mipajepudubenadipiwet.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC0 4856 bytes
SHA-256: a25c038e11679b435778e0019246da7868c0fdbad1cf978e99532d3e85d43f28
font_01_sfnt_off00011b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B47 10936 bytes
SHA-256: f5851e4cfd96b0f2140bbecc85e85e25c2cad9089c9b9557d823d09cc1569198

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