Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0530ec2e9c3852…

MALICIOUS

PDF

71.0 KB Created: 2021-02-21 20:38:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bd9ba38e7d0ec794fadf8781f466b888 SHA-1: eb590845e6f08c7367e45fccfb703fb266394134 SHA-256: dc0530ec2e9c385201909b3beb08165c04a401a1539e582709eb92eb3b3b7509
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to purchasing nutritional shakes, directing the user to a malicious URL. ClamAV and ML classifiers strongly indicate maliciousness, consistent with a phishing or trojan delivery attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect the user to a malicious site, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://leonvi.ru/wix?keyword=where+can+you+buy+nutrisystem+shakes PDF link annotation
    • http://wutomomar.22web.org/70795150023.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/c9qhcrp/pounds_to_kg_equation.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/Shbhjhf/download_game_maker_studio_for_windows_xp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443371/normal_5ff82922695b7.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/igdAjgV/lisuxogadizewesonigevu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_5ffef1df4bf8e.pdfIn PDF document text
    • http://mebelintera.ru/uc_browser_4g_download4qii0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415770/normal_5fccc5606217c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fd31b9736f09.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/hYhgegj/zombie_defence_games_hacked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498986/normal_60074ef7435ee.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/3y25ibs/nbc_sports_chicago_channel_dish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_60176bc9ca5f6.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/1gvgjQh/billie_eilish_lovely_ringtone_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380088/normal_6002894ba42e9.pdfIn PDF document text
    • https://cdn.sqhk.co/mokopizel/aa5jehd/wukepimefiwud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwaziri.epizy.com/rogafupemosisow.pdfIn PDF document text
    • http://sejojoxo.epizy.com/42868965886.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_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 5324 bytes
SHA-256: 12ee9dc2a1e1eb555ccaf07109f0ab29277fe15d207a7a05b515cb0e91b51070
font_01_sfnt_off0000e751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 11944 bytes
SHA-256: 1c27b4e83509f41cba4aa6a1f186a01130dcc31a3d848846785b1dc637219b32

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