Malicious PDF — malware analysis report

Static analysis result for SHA-256 8daa3a585bb8f4b7…

MALICIOUS

PDF

79.5 KB Created: 2020-11-21 04:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 95098a0bd54f4495b3269d0b3dbc62b3 SHA-1: b3638aeed95f4721ed9baa20e56ef6fc4d2f6ddd SHA-256: 8daa3a585bb8f4b7cd7b0514e9818d0b4146e2b33b7238e9ca68fdaa0c4e322a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=ferrets+for+sale+craigslist In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_5fa98b15b8f30.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/3365300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5fa27018c9951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387933/normal_5f97e8f321a05.pdfIn PDF document text
    • https://pomudada.weebly.com/uploads/1/3/4/3/134382041/livajamoseruvos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5fa782cc49e8d.pdfIn PDF document text
    • https://jowewuxutezu.weebly.com/uploads/1/3/4/6/134632231/8698620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_5fa2d13f9edb5.pdfIn PDF document text
    • https://miboxijudowisu.weebly.com/uploads/1/3/4/4/134491333/tazipakiwiwinapot.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/wovigebi/49697707762.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/eog_practice_test_5th_grade.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55E 5004 bytes
SHA-256: 9aea9333b6fe0eb47efb2dee03eae43acd0a5bbbffe83c51f28caaa097e550cd
font_01_sfnt_off0000f674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF674 10936 bytes
SHA-256: 429ac2b58399440ad11aeae753219865bb2c509029225542d09e8a94d40afe6e
font_02_sfnt_off00011be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE8 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995

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