Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b880f7b8ae99ee…

MALICIOUS

PDF

72.9 KB Created: 2021-03-25 04:38:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04769e15363ce9267997621f3bd76d89 SHA-1: 7bfd17a2cbc056336832ca612dec80a13d33cd23 SHA-256: 47b880f7b8ae99ee03f530920b00b6709155f4284dba470a5d377088bc024c17
156 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm or a distribution point for further malicious content. The embedded URLs, such as https://mezovuduw.ru/wix?keyword=evaluation+of+functions+worksheet+with+answers, are likely used to redirect users to phishing sites or download additional malware. No scripts were extracted, but the PDF structure itself is designed to facilitate the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=evaluation+of+functions+worksheet+with+answers
    • https://cdn.sqhk.co/tumowara/MTjbpQk/mimpi_anak_buang_air_besar_mencret.pdf
    • https://cdn.sqhk.co/nuzinipaz/bcTFDih/3d_car_wallpaper_hd_1080p_free_download.pdf
    • https://fozaxuvuten.weebly.com/uploads/1/3/3/9/133986835/tafeguwazuferijudis.pdf
    • https://cdn-cms.f-static.net/uploads/4491926/normal_6033de5f26c47.pdf
    • https://lodipopigib.weebly.com/uploads/1/3/1/8/131857338/tijexafipufixo_zusugofufape_pijab.pdf
    • https://cdn-cms.f-static.net/uploads/4457620/normal_605b1bb89d0e0.pdf
    • https://cdn-cms.f-static.net/uploads/4426957/normal_5fda0ca39b447.pdf
    • https://cdn.sqhk.co/jeporikate/gzOkAsU/novo_cinemas_manar_mall_north_ras_al_khaimah.pdf
    • https://cdn.sqhk.co/supetudoti/jicZmwp/wuxogusim.pdf
    • https://murasujudadalox.weebly.com/uploads/1/3/5/3/135338307/xunejibep.pdf
    • https://cdn-cms.f-static.net/uploads/4481289/normal_601a3b2bbae80.pdf
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5fd17d947dd50.pdf
    • https://cdn-cms.f-static.net/uploads/4370307/normal_603553003eb14.pdf
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5fd24b6702391.pdf
    • https://bokozadag.weebly.com/uploads/1/3/0/9/130969835/rorifeter.pdf
    • https://cdn.sqhk.co/tuzojivemepe/zpificj/vinug.pdf
    • https://lekibuwowobaveg.weebly.com/uploads/1/3/5/2/135295955/9262843.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_ed707f2deadf4efca018affc50ef7f5b.pdf?index=true
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_ccd26fe40e474ec79e63c283637050ea.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e062.bin
f86260e3111c020064a03ff450a23bf11799f074d51617b7ccceb851730b11f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 5144 bytes
font_01_sfnt_off0000f1fd.bin
7165e72d407d9b8bcb54c440ba993f3b85dbd3c01baec9ba2c9439367ff3d8cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 10720 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.