Malicious PDF — malware analysis report

Static analysis result for SHA-256 687795e32aaf6844…

MALICIOUS

PDF

49.0 KB Created: 2022-06-26 14:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 5.15.4) First seen: 2023-12-08
MD5: 47692cabbb3252cff26e7262ecfd4aef SHA-1: 870d4677c38f7778c5add68a3cf2eb4c1aec07ad SHA-256: 687795e32aaf6844e4f35aae7104b593093596cd45744866281584ff809037b4
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://yubit.co.za/YmrXLWy8?keyword=fireeye%20hx%20admin%20guide%202019%20free%20pdf PDF link annotation
    • https://valumimij.weebly.com/uploads/1/4/1/4/141465388/8905657f.pdfIn PDF document text
    • https://gozobamo.weebly.com/uploads/1/3/4/7/134714837/foromutosadane.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/57991925443.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/50591672657.pdfIn PDF document text
    • https://dijigizofeve.weebly.com/uploads/1/4/1/7/141766184/5c1a0a0b1.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16216f888d32fe---bupewanirajuvawem.pdfIn PDF document text
    • https://noliliwipel.weebly.com/uploads/1/4/2/0/142030451/revifeloselu-ragegudifutabax.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/runume.pdfPDF link annotation
    • https://nogenovone.weebly.com/uploads/1/3/4/7/134745979/xijugebe-lenafirokud.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/72893355517.pdfIn PDF document text
    • https://jorenofafeli.weebly.com/uploads/1/4/1/6/141680651/lujedabufigovedewu.pdfIn PDF document text
    • https://wutedisepojute.weebly.com/uploads/1/4/1/5/141599108/medegedono_tapebotilel.pdfIn PDF document text
    • https://vexamufojidemu.weebly.com/uploads/1/4/1/8/141825513/ritunegagu.pdfIn PDF document text
    • http://bom-laminates.com/user_img/files/80642891325.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/27272965954.pdfIn PDF document text
    • https://fopibene.weebly.com/uploads/1/3/4/0/134012765/3529624.pdfIn PDF document text
    • https://ronesafoko.weebly.com/uploads/1/3/4/3/134312324/visefus.pdfIn PDF document text
    • https://lamoxolital.weebly.com/uploads/1/4/2/1/142111383/domufomejepiwisogiru.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/kubuvufejagaz.pdfIn PDF document text
    • http://www.bitstream.comIn extracted file (font_00_sfnt_off000049ad.bin)
    • http://s292376414.onlinehome.fr/datas/imgmail/file/nedozufuvemukegadumot.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://dejavu.sourceforge.netIn extracted file (font_01_sfnt_off000074fc.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_01_sfnt_off000074fc.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49AD 16208 bytes
SHA-256: 2a6099230659a53009ca33d76a78ab1d3b297ee7d2fd627b87396cacc9318df2
font_01_sfnt_off000074fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FC 8940 bytes
SHA-256: 897a1d9f6f4b474150d2504b8fa79d1507a5ac285a7fb2bf61803f06dc51c46c
font_02_sfnt_off00008713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8713 10352 bytes
SHA-256: 7a959c972479cb669f292cce7a9bf44d0693799a90d61028725fe365ef7defc2
font_03_sfnt_off0000a039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA039 8856 bytes
SHA-256: 44c8af1385b163023526d0c5a4425e44828f10cb29aa1f39a301671e07e3757a