Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6e83dd6d87a3f5…

MALICIOUS

PDF

74.7 KB Created: 2021-03-20 12:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e4c9bb0ce5424c9d3742c0b87c4659da SHA-1: af9416b34da8fa2d3a1f08e6cd3ab6fac0a67405 SHA-256: 5e6e83dd6d87a3f5160a5928013f9b9d432072f4d7e9c971bdbbafb55ed5bc54
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The presence of numerous external URIs, particularly those on disposable hosting and associated with link farms, suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to search terms and document creation tools, aligning with a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/123?utm_term=alphabetize+list+in+google+sheets PDF link annotation
    • http://palitra-cveta.ru/supervisor_customer_service_job_description_resume3etuj.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/motirugurukofusuveki.pdfIn PDF document text
    • https://sijawakupud.weebly.com/uploads/1/3/0/7/130740213/gisobelowiko.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/6875813741.pdfIn PDF document text
    • https://rilinozeni.weebly.com/uploads/1/3/1/0/131070652/taxetilagonunova.pdfIn PDF document text
    • http://goproits.com/panasonic_hvx200_century_fisheyeo9czy.pdfIn PDF document text
    • http://paselon.getenjoyment.net/argonautiche_libro_2.pdfIn PDF document text
    • https://faraguwu.weebly.com/uploads/1/3/0/9/130969294/b8bbded434911f.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/iaf_airman_group_y_previous_papers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e5f3d7-edd6-41b4-9d4f-3265bbfd0ea2/35397541651.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/20391510485.pdfIn PDF document text
    • http://korofituzuxigu.onlinewebshop.net/survey_research_methods_applied_social_research_methods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01062fcc-068d-4d15-947c-cc3625819d22/pioneer_avh-x3600bhs_manual.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_f4cfae9018894905b5d8814375e22505.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/third_eye_guided_meditation_level_1.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/wow_azshara_hc_guide.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_8621b7bbe64f49d5b0d46a7265028c3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/17238571403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36777801-e7cb-46e2-bc50-cf675cbd6aba/95315058838.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/wilulanixe.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_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 5164 bytes
SHA-256: 95ecff6e5da73d9d76649a277e05d885db4ac5c5574caf1056b140fabedf8dbd
font_01_sfnt_off0000f823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 10940 bytes
SHA-256: 6f2d9958e59c938c823cfe0e3a4cd3a78798e2d40fd5b76f6d3678813508eab7

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