Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b4ad4efea6b639…

MALICIOUS

PDF

73.2 KB Created: 2021-02-21 14:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2f880d2f6e25acc26f56f07fd734064a SHA-1: dc6a38a6ce98dce4bbdc4e3e86ed777b822f6b1c SHA-256: 84b4ad4efea6b639c62842b1b5cd4f400b288fde839b21a03e4cbb2b1ebff8ea
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=thermodynamics+ch+27+1+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467019/normal_6003e122e4188.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/ifhfjiU/rafagubenulumefewefovugeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fdd3eedf3a71.pdfIn PDF document text
    • https://cdn.sqhk.co/zibusisujij/iaheahc/slimefest_2020_tickets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_6015109c8bba0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5ff81e714111e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421474/normal_60210b4a1b06c.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/hdLyB5q/mazes_more_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/jaYgfB2/wordpress_themes_download_professional.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_602cb2eadaaaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419642/normal_5ffdfdcf6e8de.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/Nhcibjj/smiggle_snake_puzzle_ball_instructions_step_by_step.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5fcd30df83b0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387706/normal_6000c42641bc7.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/fovezewi/88989533598.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/jivizumatof.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/cardiomiopatia_restritiva.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/australian_visa_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/badlapur_movie_all_song_bestwap.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/chughtai_lab_view_reports_patient.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/msa_altair_4xr.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9E 5616 bytes
SHA-256: fba90e24ce7ca8d0bd2deb2ff072710d9a44ef584f3dce2faaeed6e9bc03da3c
font_01_sfnt_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 10252 bytes
SHA-256: 8a86f399bb16189c343eb42f1688099ba0ede536864e8b70d04346fa837ac76a
font_02_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 16500 bytes
SHA-256: 25db903a447c0de261a67fe5e3c660492551e0ee0da9ce1a0b653a5433c33189

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