Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d77f092fa88edba…

MALICIOUS

PDF

73.1 KB Created: 2021-02-21 08:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 449ce8029a4e3af13948cc0103ed8c4c SHA-1: d64a00ae166b110de4893b8c5da21bbe7a2ac797 SHA-256: 3d77f092fa88edbadbfd160f12f04e3591b83a1f86e15b393c7bcf09d178f263
194 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
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=root+genius+apk+download+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_600cf44ec9c11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5fd86c85c83be.pdfIn PDF document text
    • http://bijipejip.iblogger.org/tezipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_6021514e7c56d.pdfIn PDF document text
    • http://hotita.fun/how_to_balance_chemical_equations_examples67d8y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_6019c468ac809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379841/normal_5ff6a6049c361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5ffe8bd2d5b8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450732/normal_5fc9cd8bad230.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_600941d2cdcb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411512/normal_6003add73287c.pdfIn PDF document text
    • http://itagreen.fun/nijajarupekupasecek33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368759/normal_60097cf029166.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://relumewamamit.rf.gd/primary_hyperaldosteronism_endocrine_society_guidelines.pdfIn PDF document text
    • http://bapaxezeb.epizy.com/fovopawid.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_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 5484 bytes
SHA-256: 3ccb881ddbb9b8146ff1e768f4d38ecaabe04b75fca528411ee1b74f194859b2
font_01_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 13124 bytes
SHA-256: 0090bc7374c0f0486fa97dd03996d5d70d1e952fee90051fe8e6d67751d47c39