Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ebb54781e90ec0f…

MALICIOUS

PDF

72.2 KB Created: 2021-02-17 14:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b99392dd724f6b913bf833bbecb51535 SHA-1: cd701e3f38f0751fe2f12866e4f899c5816b9c37 SHA-256: 4ebb54781e90ec0f7dbb48078a5913d31c140228896651037de23db4bcd06e4e
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://crophysi.ru/wb?keyword=essentials%20of%20human%20anatomy%20and%20physiology%20lab%20manual%20marieb%20pdf In PDF document text
    • http://luminar2-download.xyz/zumibikupege6zdu0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5feb180063493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5fdd7ab4395e1.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/WMQvKIe/huey_p_newton_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/kowipopi/nhgIheO/tomimozuzuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_60120873d9a90.pdfIn PDF document text
    • http://teksol.xyz/avg_latest_update_definition_freec0bgb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494648/normal_600167620642d.pdfIn PDF document text
    • http://sidesevofexow.22web.org/new_amsterdam_season_3_episode_guide.pdfIn PDF document text
    • http://pravagims.net/82508650328hpi39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485451/normal_6005890ddfdcb.pdfIn PDF document text
    • http://exemplpusj.com/papunevedegemezewzlksu.pdfIn PDF document text
    • http://physcoo.com/understanding_computers_today_and_tol3k28.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/wiimVZl/bmx_master_bike_games_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/he60gdl/doom_2_cheats_steam.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_off0000deb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB6 5656 bytes
SHA-256: c74c2362e106c7431332880a60088ccafdc27e590eb352845873b6b2713b5429
font_01_sfnt_off0000f1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D2 9780 bytes
SHA-256: 412864e58ec3affe0b1dab291293fca29ff31655cec58f345654ca9fca993428