Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de055ddf728f92a…

MALICIOUS

PDF

77.8 KB Created: 2022-03-30 01:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: df949787f0530c47452b5b7a3e6f8119 SHA-1: 4455fdefc2dc5a027e103a626ff4db1a99f6b1f9 SHA-256: 4de055ddf728f92aa4df3ef3e6a330248de7ccc306e52881f5b1f4569858ad8c
266 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://wirut.co.za/YmrXLWy8?keyword=braun%20series%207%20790cc%20best%20price%20uk PDF link annotation
    • https://topas-rus.ru/media-temp/img/uploads/files/88920944942.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1623663374924b---nilijusifojomexorune.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/ramonitugelulofajogup.pdfIn PDF document text
    • https://vunufifok.weebly.com/uploads/1/3/4/5/134525051/b3fe4c992.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/letadakefoni.pdfIn PDF document text
    • https://papuxivosep.weebly.com/uploads/1/3/4/4/134491017/modovonoluseji.pdfIn PDF document text
    • https://ganivakolijovi.weebly.com/uploads/1/3/4/6/134666525/1812884.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/79747335961.pdfIn PDF document text
    • https://muwamobole.weebly.com/uploads/1/3/4/3/134356931/divopavuv_wetasob_kudilimix_vivigajufila.pdfIn PDF document text
    • https://jebezowurexa.weebly.com/uploads/1/3/4/5/134576847/4683224.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/gupirel.pdfIn PDF document text
    • https://subarini.sibiuimobiliare.ro/mm/file/20168867566.pdfIn PDF document text
    • https://www.photosenpoesie.fr/ckeditor/kcfinder/upload/files/66507739224.pdfIn PDF document text
    • https://ranumurubakek.weebly.com/uploads/1/3/5/3/135341533/15d070853c81688.pdfIn PDF document text
    • https://waxovidimised.weebly.com/uploads/1/3/4/4/134446407/5928294.pdfIn PDF document text
    • https://xupufofi.weebly.com/uploads/1/3/4/7/134766196/5617517.pdfIn PDF document text
    • http://xycrusher.com/d/files/85681849886.pdfIn PDF document text
    • https://childrencareandliteracysociety.org/userfiles/files/21985977623.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/vabep.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_00_sfnt_off0000cbea.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000cbea.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEA 10928 bytes
SHA-256: 00437b6de6ddabb39d43c4763389adf7d762d2b1653688ae6f4a91e2999e259d
font_01_sfnt_off0000e545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE545 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 17020 bytes
SHA-256: 6f8703fcb428c169a622f9fe77f9d3f7cd605bd2e11c4304a62b05f480a004e8