Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c47f28f2831ab0…

MALICIOUS

PDF

67.7 KB Created: 2021-02-18 05:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f51aa20625cf4b5b2c20e6af0aa10b8e SHA-1: a8121bc6bd4b99ec986885b4c3a90d2f34b831d5 SHA-256: a9c47f28f2831ab03c756cfb2677e67e78863250984d7bfafa4e176e703da3f1
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://baarspo.ru/wb?keyword=how%20to%20rename%20an%20ipod%20nano PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5feafee1ba632.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/8kynRif/tixale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490125/normal_5ffdb7eaa880e.pdfIn PDF document text
    • http://amorexpo.com/spring_webflux_tutorialt49h0.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/Iidmojd/nedirakinuto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470833/normal_60068da51d24b.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/hhvuhbW/bni_triangle_business_builders.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolosew/gh2hijj/gilufifanupadajex.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/dSQhaig/heroes_of_greek_mythology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5fe8ddb97125d.pdfIn PDF document text
    • http://grinallex.shop/kizixitoxusedidigu1vn10.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/wurivuve/voice_recorder_app_for_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/virev.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/bunoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/star_wars_essential_atlas_map.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_off0000cd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6D 4948 bytes
SHA-256: e644c21c7fbc8c9ea5357e152bda0a1d87abecb44c35c0d5e159f86ec4826f42
font_01_sfnt_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 10640 bytes
SHA-256: 47cbe0156dbb029bf40b8d94491488c0dfe06b4b398e81612af38e9364a7f8d9