Malicious PDF — malware analysis report

Static analysis result for SHA-256 adad7f6b8bb334bb…

MALICIOUS

PDF

80.1 KB Created: 2021-02-05 08:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bf64a95c403d96b89b7280e05bd401e8 SHA-1: f865d82fee2cf3b0cc9707eb5188deef17d2bf62 SHA-256: adad7f6b8bb334bb23acb2e144d19b1108ce29544d3639df3741c2abbdb9f7fd
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

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://maypoin.ru/123?utm_term=zhumell+z8+vs+apertura+ad8 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480728/normal_5fd677845841c.pdfIn PDF document text
    • http://vuvopogawuxaxax.22web.org/budget_2018_19_bangladesh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405652/normal_600e32101604d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_600a05c01f789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5ff27d44523fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_601cd49b0041f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_600cb31b75604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_601a019ea8eb7.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/jebupofedijakuk/summoners_war_runes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/novesugamedukejevizuwon.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/retract_resignation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/96694855813.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/131940050.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/bewumededajezunijijod.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/how_are_you_today_interview_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/cambridge_collocation_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/tusunaxumomixubuputesex.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/lolalakimusojavapaguxe.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_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 5460 bytes
SHA-256: df02619e958eb168bc8fb1a13f47316b7bc5fa948fcf01af1d877bb7ca2af525
font_01_sfnt_off00010d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D78 11152 bytes
SHA-256: 29cdf59d24bda131df506af158cccc627a8f5dedb076d99e10ea8eb04168eedc

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