Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffda078cd861c545…

MALICIOUS

PDF

71.5 KB Created: 2021-02-23 23:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0bef14f1b2919130077d759af0d858e8 SHA-1: 427ada2dee7c9b9b4c0a23f35a93e9035f34e078 SHA-256: ffda078cd861c5452d4b0c15c8911d3798ac313ee44c9769c6b0b4c8cddee8e5
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://yafferge.ru/wix?keyword=club+penguin+tour+guide+answers In PDF document text
    • https://cdn.sqhk.co/pulununese/9Fk5Zgc/derwent_inktense_pencils_24_tin.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/hbibiik/12007301581.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/ZgcMViL/emergency_contact_lenses_same_day.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391915/normal_5fe25218e47c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406168/normal_600b73e01eef3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497075/normal_5fcd96efc0800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380858/normal_60011535e75f7.pdfIn PDF document text
    • https://cdn.sqhk.co/kevapaboxer/ibS57uk/movie_collections_to_binge_watch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453743/normal_5fef3bdd7fe3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_601e594a0f40a.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/uieHhj9/mumimosidokesekiw.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/hgjtgga/photomath_solver_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_6003d75adff75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_600fdf5077fd4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 5264 bytes
SHA-256: f846dc93495fe5771ff9c5771170f51f70335981e6ea148cbf27a7c27d345543
font_01_sfnt_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 10260 bytes
SHA-256: 5487c193335bdc64f052174dd5eb23fb116d2ff6f97a3bc9d7098f0f9720fa17