Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5433a14cf8126e…

MALICIOUS

PDF

68.3 KB Created: 2021-03-09 04:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2eead0769583a78521615a0fa7a9b7b2 SHA-1: beb39238b93d70a540ab1e2ebdab5c64ce38d0b6 SHA-256: 8c5433a14cf8126e5a0fad2379e77136574f8e9e0eb2d11c7b6c1a3aae845635
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/award?keyword=mallorca+isaac+albeniz+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487186/normal_5fd2c0453907d.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/ibzicGL/cartoon_video_editor_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/unjajjm/national_geographic_dobson_telescope_instructions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381294/normal_60048a2f5bd75.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/dJgehcZ/58779570962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_5fc8134316714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_60366644a32b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490263/normal_6004c16d6399a.pdfIn PDF document text
    • https://cdn.sqhk.co/zogaxokeno/0dgeTgj/nulixomuxikevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5fe7309da56b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_60203e133de79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_602d71fe718ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5fcb2187eb41c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467571/normal_5fddc956dcad8.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/9ehf7jd/hill_climb_racing_game_play_for_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5fe876c149f80.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/Egdtkid/dice_tray_dnd_5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_42958ae9f34f4e9f90ec7d10a6a5bcce.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_7b2535e4866b4172b6728558c1009125.pdf?index=trueIn PDF document text
    • https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_7f37de074a0449df83083378d088ca2a.pdf?index=trueIn 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_off0000cf5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5C 5344 bytes
SHA-256: 325842f4d3a343d89b6a38cfa529be9cc74fb1d93ccc71e383dd6e661396dfc7
font_01_sfnt_off0000e1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A7 10104 bytes
SHA-256: 15213c3719f0a1b7784e71980c1fa88231fd70190d63dcaf0550cc6fad5349de

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