Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b99250d14f5ec3…

MALICIOUS

PDF

73.0 KB Created: 2021-02-26 05:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0d7671eb8c233ca099232118ecc224c0 SHA-1: 13e937cd40bd4621f90b38b330aa6e572b58bdfe SHA-256: 51b99250d14f5ec330e9040323986ad57b59dff3037fc39d747bd93e10fd6297
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/wix?keyword=d%2526d+air+genasi+name+generator In PDF document text
    • https://static.s123-cdn-static.com/uploads/4467306/normal_5ffd5357befe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fd27462edd55.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/jesidofefe/441602008.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/50904454136.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/muroxajulegowezafajeris.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/jidukagavobopexidefi.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/chicago_marathon_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/60298545100.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/android_tv_setup_openvpn.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/72008771800.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/35033647847.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/falsifying_police_report_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/81559416906.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/argos_brushed_cotton_double_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/misenewiwupeguvemam.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/zagulov.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/galvanized_roofing_sheet_sizes.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/software_espiao_android_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/free_pascal_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/buvedowoveniten.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/g._i._corrugated_sheet_sizes.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_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 4156 bytes
SHA-256: 7b9a78bc71d00e4bcff8473d51fc82c270a18144a13d22e5cfd906eda86eaada
font_01_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 10224 bytes
SHA-256: 49363a1b910a2fbceb47d13c4a6b3c018b9e2f71e276388cb18c7c13c36051b8

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