Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f2eede779434cc…

MALICIOUS

PDF

34.3 KB Created: 2020-11-05 22:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a9b61a5f83884f9e6589043ed27e9319 SHA-1: 9c1d748aceaac05ba376d5954e9792e9a5afcec4 SHA-256: 98f2eede779434cc4d66d3953e02eb9077348cfec2660c2433aa5c9850427873
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?keyword=earn+to+die+2012+hacked+game In PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/besorutufimoja.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/5470614.pdfIn PDF document text
    • https://mofasabopileb.weebly.com/uploads/1/3/4/1/134109330/ditufujeraji.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/zolurovezokulasu.pdfIn PDF document text
    • https://rosikotukixaru.weebly.com/uploads/1/3/4/3/134312973/8981708.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/zuxadol/assembly_language_programming_of_8086_microprocessor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfa64de-60a9-4183-b1d6-e22f93f70cb0/vipuwudixux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f7cd26-8203-4e1c-a119-e74a6736c1d7/long_range_22lr_competition.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/ee_cummings_selected_poems.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/bridge_over_troubled_water_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/9th_class_english_textbook_ap.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/bhagavad_gita_chapter_14_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/zewiros.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/2112968543.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/59250394414.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_off00004849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4849 5488 bytes
SHA-256: d0d0dacf9cd2fce05923001ac60afd293830b90a81a66509396c0075f5cec27e
font_01_sfnt_off00005ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD7 9828 bytes
SHA-256: 066cc0eabcb1226b79b0dec6c59188a07713bb5efbefc0bb69d86d33bf152add

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