Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bc33edfe517039…

MALICIOUS

PDF

72.2 KB Created: 2021-02-19 17:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3785562ec52ea45d73d27c3936afe4eb SHA-1: 9f0d11b01e2324dd69969030b592eb5dec860b3f SHA-256: 08bc33edfe5170392f023f6a9bbfe7f9cccb496d2fd4f2dfef182279a6f3a423
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=writing%252Fsolving+solutions+worksheet+pdf In PDF document text
    • https://cdn.sqhk.co/niporatibu/eghqggd/52946112591.pdfIn PDF document text
    • http://nekretnine.site/sample_maternity_leave_letter5unct.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_602d693013502.pdfIn PDF document text
    • http://repair-monokoles.ru/42581689018af16h.pdfIn PDF document text
    • http://card2card.live/boxers_diet_plan_weight_lossxola9.pdfIn PDF document text
    • http://avtovishki-msk.ru/tegiwifexevupikqfevd.pdfIn PDF document text
    • http://help-verification.com/cucumber_js_report_formatcb3nq.pdfIn PDF document text
    • http://easylearning.space/best_prison_break_movies_listg3kfd.pdfIn PDF document text
    • http://telgrm.site/sasekefazofaduxe3kaez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475563/normal_5fec845f15848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501057/normal_5fdd9aba24f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495393/normal_600f65164e24f.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/6t0LPRR/dream_player_for_android_tv_premium.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476925/normal_5fdf2a52ee806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443326/normal_6008bfb5ba5cf.pdfIn PDF document text
    • http://specrazreshenie.com/gaxexewuxuwowubofabovaj42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD91 5360 bytes
SHA-256: fa10fa84d8e30406c3612aaee742f8ee4b4dec3a807ae5e15fbb4b4eae4f448e
font_01_sfnt_off0000eff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF1 10440 bytes
SHA-256: 6dd94abc6553e81c460168c8cf417d06be87ab754157c9322540ed4fc131893c