Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed75cea394a36ed…

MALICIOUS

PDF

72.2 KB Created: 2021-02-04 08:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bfc21c8c3ad138ab3e0665ecb7512064 SHA-1: ea139180eca56a75d391cf05b243b3480fd4d4c4 SHA-256: bed75cea394a36ed86172a9c4a7f8205ff6afa51c8a01ad0b087c3a81dc2fa47
194 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
  • 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=excel%202010%20bedingte%20formatierung%20ganze%20zeile%20einf%C3%A4rben In PDF document text
    • https://cdn.sqhk.co/fenazijeguk/ji7gghd/tumblebooks_free_no_login_webster.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/aifNbgi/sound_level_meter_app_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_6019f2866b605.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fcf2bc33f28e.pdfIn PDF document text
    • https://cdn.sqhk.co/ligazupevu/ggxje70/extreme_car_drifting_simulator.pdfIn PDF document text
    • http://bafekovarobuju.iblogger.org/33586139930.pdfIn PDF document text
    • http://8gusevshop.space/bubba_forrest_gump_quotesjcn7g.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/hfgj95T/xuzaporatuxobulironubi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480753/normal_5fcb089991a1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419832/normal_60069b72e12b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455657/normal_5fc944e3c62bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367297/normal_6003143c4ca74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453108/normal_5fee29abb402d.pdfIn PDF document text
    • http://loveworld.club/worksheet_atomic_structure_chemistry_a_study_of_matter9fj0m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379038/normal_5fff63076f5d7.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_off0000d615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 5940 bytes
SHA-256: abe7a6a9324c6d3ce170fbe8e5e25fa14aecaad0f4fa79c974c43cb138f9b7dd
font_01_sfnt_off0000e9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BF 11848 bytes
SHA-256: 9e6f3a8625433e0e159e13941ef53506cb7f4200f25868a40b580b52da678e96