Malicious PDF — malware analysis report

Static analysis result for SHA-256 05475caa809e9a57…

MALICIOUS

PDF

77.1 KB Created: 2021-02-12 02:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 863515285acfd16a52d9907cc1f3d51c SHA-1: f8020d3c2a990e6488c7384a1581a9447a081b6c SHA-256: 05475caa809e9a57e741977b57013ca4a040884820ad560fc6f919c6f82e92fb
96 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 intent. The embedded URL points to a domain that appears to be part of a phishing or scam campaign, likely intended to trick users into believing they need to resolve an issue with their photos. No scripts were extracted, but the presence of an external URI suggests the document's primary purpose is to redirect the user to a malicious site.

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=my+picasa+photos+have+disappeared PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453729/normal_5ff31381a1af4.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/hcih8ge/50711338510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_60184e6e44778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417212/normal_5fedcc1bd180c.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/h08LXjL/jololusesopemup.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/zamuriza/lepuman.pdfIn PDF document text
    • http://jenepopavuse.epizy.com/research_on_school_uniforms_and_bullying.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/37255044503.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/couper_un_en_plusieurs_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/aeci_2018_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/illnesses_worksheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/84469351718.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/printable_coloring_sheets_for_easter_bunny.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/nerepoxeserikimaj.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_off0000f276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 5296 bytes
SHA-256: 43d1b95d765f7b2fa7d60adcd7fac6d8e55feea75caf6d5ff2b8f9e066f6b24e
font_01_sfnt_off0001048a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 10112 bytes
SHA-256: b1b002654620a0315736a74bf96f99afcab6bdc9b0b7ae5cba5ce6f920b92ff3

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