Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf7629b53ff1a7e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-10 02:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6dd680af221ea2013dc0c2778347631d SHA-1: 5004feb6b80a88436c96d5f0fd3cb935dbc594f1 SHA-256: edf7629b53ff1a7ee36072cda26a7b0bde13b6ea0f3825349f3b89bf7b4a9026
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wix?keyword=hyundai+sonata+manual+2009 PDF link annotation
    • http://ooovseanalizi.ru/five_nights_at_freddys_1_free_gameplayofswo.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/Khckjfp/45684794472.pdfIn PDF document text
    • http://urro-hu.com/xefilosenewujubadslj.pdfIn PDF document text
    • http://ligumexijigab.getenjoyment.net/1991479579.pdfIn PDF document text
    • http://testersairf.xyz/coin_cheats_for_rollercoaster_tycoon_4_mobile7rtdu.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/djgjezz/kpop_twice_news_2020.pdfIn PDF document text
    • http://pitushok.space/wibotifubozimewaxawasotuk1046n.pdfIn PDF document text
    • http://loxiturizule.sportsontheweb.net/20377218327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satudifin/conditional_sentences_exercises_with_answers_doc.pdfIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_760597ea5b48442da06a012125612af9.pdf?index=trueIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_ca881e18114048688313ee63cb0297e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/apsrtc_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/fire_safety_audit_report_template.pdfIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_3c664b7835ec408680f071c949c606f7.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_15f7706e5b334cefa0c81941e4ac08d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/69028256246.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/favemebukusunet.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/wufavuvopi.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/xudorojo.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/wonugoluxotexowewiraku.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_4894a4f703ff43c78cf7d0a87b111e72.pdf?index=trueIn PDF document text
    • http://xemigososefof.atwebpages.com/zarijeborezamefi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 5368 bytes
SHA-256: d7ae8a0005b500c5134531a7bd6d87c0b98212f0f36014cf793c826910013b59
font_01_sfnt_off000107b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 10412 bytes
SHA-256: e74347006d388957affe5bb42eccb6ff4a93309c8cf68b2de622ab61b440b77a

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