Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a52633fe294b19…

MALICIOUS

PDF

71.6 KB Created: 2021-02-24 02:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: eb0c79218d6817424906813e4ce9f5f7 SHA-1: 4b726bc2017341a21b6e0542d54d80d1e50f4e66 SHA-256: a8a52633fe294b19a7ac19f0a26730224d3adabd47836e7192e4943d0a63c3cd
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=binomial+expansion+practice+worksheet PDF link annotation
    • http://shimano-stradic.ru/60550599042osr0r.pdfIn PDF document text
    • http://bridgecommerce.com/fronius_eco_27._0-_3-_s_datasheetpp1t3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374022/normal_5fe2f81ea1b69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477649/normal_5feb48023de61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426974/normal_5fd0640c96e10.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/duqXjhy/brick_builder_lego_technic_helicopter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_602dde9e225d2.pdfIn PDF document text
    • http://stixlife.info/5956599512978sr1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392647/normal_60093e529e3a6.pdfIn PDF document text
    • http://secureappeal.com/how_to_say_let_us_pray_in_latinffb9i.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/gapivegek/clash_royale_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/gugazulefijewufusi.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/rapog.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/bmw_225xe_iperformance_active_tourer_preis.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/math_fraction_worksheets_5th_grade.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_off0000dadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADF 5444 bytes
SHA-256: 8094ca163e7382ff0290f45d03d8b77500dabe2e0762c2ce694d77b2ef77826a
font_01_sfnt_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 10536 bytes
SHA-256: 729ead654570224fe0baf0f96f5051e168656c87ac0eb53abbc5e2bdc04bf1af