Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfc5fc62f51d983…

MALICIOUS

PDF

70.1 KB Created: 2021-02-11 14:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b00dc73cff209776e80cc637ce2c7431 SHA-1: 278cda9d21b934c968b85260dfb702e9cd5a6506 SHA-256: 5cfc5fc62f51d98392fea1dc7a88e30761cece6c2ec398994991df7d279824a2
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://druttle.ru/wix?keyword=decrees+crossword+answer PDF link annotation
    • https://cdn.sqhk.co/vozeseseber/LgjgJgj/44387165267.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/gi5jjVX/62324297153.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/hiShdL7/83365429902.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/iK0bhgQ/mediamonkey_gold_full_download.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/luzotigedamuler.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/sesijesule/5040760985.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/abbey_road_tg_mastering_chain_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/target_band_7_ielts_general_module.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/gofisumumorureridi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/best_free_android_antivirus_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/adobe_ocr_to_word.pdfIn PDF document text
    • http://wozowopug.rf.gd/fodemitaxaxom.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/36727109734.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/reality_is_often_disappointing_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/atriplex_lentiformis_ssp._lentiformis.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/free_codeigniter_admin_template.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/posojinivixijodadedimo.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_off0000d805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD805 4992 bytes
SHA-256: 12c71dac67236565befc2b0ff53c2a7ee43134d027ac1ec93fcca28c22ff8db5
font_01_sfnt_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 10220 bytes
SHA-256: 5c30c1bba3ecc01e58cab096485cc63b1d1348da7e3b159b3c653f36768258e9

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