Malicious PDF — malware analysis report

Static analysis result for SHA-256 500474d0e813c191…

MALICIOUS

PDF

69.5 KB Created: 2021-02-12 23:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0763bfdfaf93c91f19c4ef87171e4ae8 SHA-1: 90c31b0cb523e6f3729889373ca644bf14dbcb83 SHA-256: 500474d0e813c1918f17f81ba144fb1f1e46ada86ca83b51cb65c4ee2cc51cb1
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://druttle.ru/wb?keyword=neutropenic%20fever%20guidelines%20pediatrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460233/normal_6008a99e58868.pdfIn PDF document text
    • http://reduslim-italy.site/28908161765fvpur.pdfIn PDF document text
    • https://cdn.sqhk.co/balapakufogo/ie5pNPs/ninja_run_adventure_mod_apk_unlimited_gems.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/gWZYAge/kalorik_10-_cup_retro_coffee_maker_in_cream.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5ff06a2818388.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/djgmgez/e-_wallet_meaning_in_commerce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_6023d78b8611b.pdfIn PDF document text
    • https://cdn.sqhk.co/gaduwifawide/Zginhgd/zombie_frontier_3_mod_apk_download_android.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/fewunadupop/83087926773.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/mhf4u_test_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/mean_arterial_pressure_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/guiders_academy_kochi.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/pujanefebefakugeliw.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/16374321002.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/pyromancer_guide_dark_souls_3.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/pibavurawi.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/chemistry_calorimetry_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/latest_snapchat_app.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_off0000d115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 5352 bytes
SHA-256: bb6d675e0c1875353dfb57ccd7e9706f66dbef09c5835bc1be79b1378c1725c3
font_01_sfnt_off0000e36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36D 11164 bytes
SHA-256: 05580190e69f06a9548d863e3dde4cde230c7c1a984c0a82f1bd272d641e5e69