Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a44c1f43549129…

MALICIOUS

PDF

66.8 KB Created: 2021-03-02 22:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 30b8193c45d38811bb6338d220c51065 SHA-1: a164b32670d7b847730d2121ccc6ff203efc3061 SHA-256: 49a44c1f435491294eff9e7e220d558c79ea7c023f34328e949fd28faed68ce7
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/award?keyword=sub+zero+650+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408352/normal_603c3553ac04c.pdfIn PDF document text
    • http://edarudost.online/kijaxabasugolop6sj1x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382948/normal_5fe27d93d5d8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_5fcb51b076dd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380701/normal_5fcd56f1d3706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5feef959cee90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_60158d1aae6e4.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/fajixe/81009355287.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/45231089603.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/28117935620.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/laxerul.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/berisugojidakuxe.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/asia_pacific_map_free.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_off0000caf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF0 5364 bytes
SHA-256: 8adb9d9d23a5001549d9f7c46db2027a67f2a281fedf99b09a2cad22fe09f597
font_01_sfnt_off0000dd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1E 9752 bytes
SHA-256: a69ccf330d19bc7a7c8e990b52779b19cca1774934435a713e14657eb1047626

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