Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f8500832b432bb…

MALICIOUS

PDF

64.7 KB Created: 2021-02-17 12:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7cc449c1ffcec83aa5058f1495af6e92 SHA-1: 5237aa40278282c980c82291445f1b58d72c1620 SHA-256: f6f8500832b432bb0b92d3c671955866f2bdab38e4a3784753e42f6433b8c0ca
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/wix?keyword=classification+key+worksheet+year+6 In PDF document text
    • http://startbastar.online/62345015099le9tz.pdfIn PDF document text
    • http://munupozazuwo.iblogger.org/jupalawevi.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/hijb8ig/truck_wallpaper_android_hd_flower.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/htjimia/79577150703.pdfIn PDF document text
    • http://onlinetyz.xyz/safivomalimikaxejemqkm9f.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/egdjhc2/boomerang_app_alternative.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/UzibhiW/tojupodepajisibodaradafip.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/zukogi/zajotetefunokadonuluwited.pdfIn PDF document text
    • http://roxonotagake.rf.gd/nikatiwenemudatazajami.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/organizational_chart_template_microsoft_office.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/queen_live_bootlegs.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/xororanaxisadaruzu.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/magazine_design_ideas.pdfIn PDF document text
    • http://kaluzoxot.epizy.com/dodamaxoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/cartoon_yourself_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/bakawexifixikubapal.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/accounting_period_definition.pdfIn PDF document text
    • http://xuduzunubedi.rf.gd/cra_report_gst.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_off0000c4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C1 5288 bytes
SHA-256: 86e2cb5b573b991eba4fffeb78a379b177f3491dd4a8f34297ecae2f24a14ed2
font_01_sfnt_off0000d6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CB 9144 bytes
SHA-256: 11cd759e2aafec944663e7b4b1c91da3e15148ce07f5c92e2b14efb22c884448

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