Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7d1ec6769e1163…

MALICIOUS

PDF

66.4 KB Created: 2020-11-07 04:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 55a36c98ded6da333f5ebbde9524f50d SHA-1: 6a3c68eecc9c7c05fa46a6136a2939e5f3514530 SHA-256: dd7d1ec6769e116351c4abc0cd9bef6765ba6990da7048cae1bfd6924280e169
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffi.ru/aws?keyword=soul+eater+the+kishin PDF link annotation
    • https://muvitaburire.weebly.com/uploads/1/3/4/4/134441723/patariduviruninopus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f9886d1c56da.pdfIn PDF document text
    • https://kugakisan.weebly.com/uploads/1/3/4/3/134390280/9941463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f8a4df42ee46.pdfIn PDF document text
    • https://suzaruluzi.weebly.com/uploads/1/3/4/4/134455671/barifi.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/timafatafej/77606444588.pdfIn PDF document text
    • https://kozosimo.files.wordpress.com/2020/11/78125479540.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/58834734569.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/how_to_improve_critical_thinking_skills.pdfIn PDF document text
    • https://dagovivebige.files.wordpress.com/2020/11/99869985201.pdfIn PDF document text
    • https://fofarilem.files.wordpress.com/2020/11/comprehension_worksheets_for_grade_9.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/basic_accounting_entries_in_tally.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9759 14704 bytes
SHA-256: fd0d9b93e2ca88a8477e3c020268941113d02610854d6d42f275df4c09b5b6f0
font_01_sfnt_off0000c6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D7 4940 bytes
SHA-256: 5e138f4faf3e5ca0e44f5ee0fde4798c5758d25153704a8902b4f6caf6aae990
font_02_sfnt_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 11164 bytes
SHA-256: 0af09020dca6a32738e4f35a3e02f1aa981b1b6dee726e4aaa019d6b2389514e

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