Malicious PDF — malware analysis report

Static analysis result for SHA-256 91cbe52c07c467eb…

MALICIOUS

PDF

73.7 KB Created: 2021-02-19 20:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a0cc5c05a52a99601c10a2a12ddd3f89 SHA-1: 1864af2aa8fc1b93d996344b66c142972aa7497d SHA-256: 91cbe52c07c467eb3e1c4001a2c84e30c077178abc4f7ea1f2b6573797923cac
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/wb?keyword=graphic%20design%20rate%20card%20pdf PDF link annotation
    • https://cdn.sqhk.co/vumuwuxa/48ghdhb/kufakoforusibutewan.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/hepxhiN/download_game_traffic_run_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/gcheIge/59248189462.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/hrjhJu4/hurricane_superhero_wind_tornado_vegas_mafia_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/idjifgj/78854557665.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/dadotetamile.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/tovipenepexe-rujazer-zamarutixirew-wujukigi.pdfIn PDF document text
    • https://xorapuwo.weebly.com/uploads/1/3/0/8/130873927/vituriw_dibela.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/jgdLhje/baremiwonawebadifebibaxe.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/sojebelevenex/ribotafepiredunof.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/34000771444.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/already_yet_just_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/6916938719.pdfIn PDF document text
    • http://kasisag.epizy.com/latest_tom_clancy_games.pdfIn PDF document text
    • http://sofijorube.rf.gd/binufo.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_off0000e329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE329 5416 bytes
SHA-256: 6baaa25a06c42ae1bdc79c35b8d75cbb9c96bdb3d5c285549617a1444a3eba12
font_01_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 10764 bytes
SHA-256: 337d7ccf903bcab39fa02081ab0f8c25aafe98457cef2ccf140377d68c6df6bb