Malicious PDF — malware analysis report

Static analysis result for SHA-256 779369a2df1de376…

MALICIOUS

PDF

74.5 KB Created: 2021-02-13 01:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cca4713451a412f3a014c7c5131802d1 SHA-1: a5e67bc400bc395b871d4d1321cacc8057b93929 SHA-256: 779369a2df1de376acbd8fc74f4e774977ea9cc17467943126aad6f0125ef8eb
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/aws?utm_term=adaptation+of+fish+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369322/normal_601f9b95c1567.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367305/normal_5fdd2d6b34f22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_601dd7833ca42.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/JifFhuo/7328494568.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/cFZKgju/89759755357.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408589/normal_5fcc8227b8c65.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/geIhgHM/cubes_3d_game_cube_dashboard.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5fc6de2243e6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470035/normal_60036216e6acd.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/dinilederu/android_xml_namespace_prefix.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/52344073479.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/biztalk_server_2016_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/26761111945.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/gotarudemabires.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/jamusobifudotakuzevut.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_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 4992 bytes
SHA-256: d9508280ad3a0ab8e4728e39a7ee79edd75b351c0d2e5617a1dd5aa9cab47029
font_01_sfnt_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 10432 bytes
SHA-256: ccc8bb2cd84886dbdbbac64baec2089ac74d0c974242639be8e03b3069861578