Malicious PDF — malware analysis report

Static analysis result for SHA-256 77731f377e58bb2e…

MALICIOUS

PDF

72.5 KB Created: 2021-02-10 13:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e0e23fb1688c6a31488d429e04bac3ea SHA-1: a09d7af055891855ca3fd18531cf44b96b92d20a SHA-256: 77731f377e58bb2e623e564cb19ebae1cda7ca4482f5222e22448fa090beb0a9
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wb?keyword=church%20flyers%20psd%20templates PDF link annotation
    • http://decideyouself.fun/english_padhne_ka_tarika_video6j4ud.pdfIn PDF document text
    • http://sasezifunapa.iblogger.org/australian_visitor_visa_application_form_1149.pdfIn PDF document text
    • http://chunyoo.com/77008777176fzp3x.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/lopadivupudexa/nezoguvivegax.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/19905268422.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/87010722947.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/bench_press_form.pdfIn PDF document text
    • http://maferodo.epizy.com/sulagepo.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/xalupemiroz.pdfIn PDF document text
    • http://zevebetuj.epizy.com/43132881918.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/lazunitof.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/bhimavaram_weather_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/ybn_almighty_jay_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/zegebawologivak.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/chandu_telugu_movie_free.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_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 5404 bytes
SHA-256: 556dbce28524ff7a213ff84c8c093ea02452f7ec2d4ac39a234956c9af692a38
font_01_sfnt_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 10356 bytes
SHA-256: 896797590e0ab72ccf54e15889680b641dc39859071fa04e8087245a97a571a2