Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd96f39bfdd0633e…

MALICIOUS

PDF

69.5 KB Created: 2021-03-02 09:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 049444639dfd2fc7ea511572458bd35e SHA-1: 3efebff95edfd7f7b456e917caeb0848dc67ae5b SHA-256: dd96f39bfdd0633ebb9875e123cda3dc8b492f649013109add7ea6d6e2fd6d4f
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://ponafet.ru/award?keyword=bible+quiz+on+genesis+chapter+11-20 PDF link annotation
    • http://nutopul.22web.org/murawakuxakurelosa.pdfIn PDF document text
    • http://wavasesinile.22web.org/freddie_mac_guidelines_2018.pdfIn PDF document text
    • https://bejetatibuket.weebly.com/uploads/1/3/5/9/135957672/wepidemokusorupemaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5feba2cdd6291.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/ji1hc9B/61526510981.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/ihaP0Mq/web_designer_assistant_salary_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/jdxjfge/jagowakawuramu.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/mejobu/67297627560.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/english_learning_online_classes.pdfIn PDF document text
    • http://jerimopujokanar.epizy.com/metro_exodus_pc_performance_tweaks.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/bajul.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/62272401515.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/bounty_game_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/27658675384.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_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 5916 bytes
SHA-256: 8e2359685fbf0f34c3ed9d2d3892134fb82aaa91e1997ba07496ac643449d3f5
font_01_sfnt_off0000e51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51E 10592 bytes
SHA-256: 4cb320bc43c027d4ff58da2a8a4e71ef03adbe65e632c7f5b025421936f2cb5d

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