Malicious PDF — malware analysis report

Static analysis result for SHA-256 62724af23cef9f8f…

MALICIOUS

PDF

55.2 KB Created: 2020-11-07 11:35:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: c56b7a8180eddfc46acfec4304746086 SHA-1: 6c6f7894aa03ff75905afc7ca6d3177d948b69e0 SHA-256: 62724af23cef9f8fe567f79d6a6cc7bee9901183bf39a37bd0bc634c2466100a
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=lara+croft+pc+game+download In PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/1847100.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/7654695.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/58954.pdfIn PDF document text
    • https://lopuzidijunusi.weebly.com/uploads/1/3/4/3/134378181/lalanuvur_tadozuxopidat_mufewatoti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d687cdc-f1e4-4a46-8696-b9bf4afe9142/17522357605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b4ae3f-e2d9-4f8e-a9ee-4855b1c66b6a/delixi.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/1140132423.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/how_to_become_a_twitch_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7501bcb7-85d1-4ad6-aa7c-62e5e8129005/36253284895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/379432ed-a2d1-48b7-a75d-551bf9d40067/12063918756.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/chemistry_unit_2_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/60825410175.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_off00009941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9941 5332 bytes
SHA-256: 529af7f93f1d0329085334f45dfb545ffe28e9f1e7c9368e53802feeab6c22e9
font_01_sfnt_off0000ab67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB67 10676 bytes
SHA-256: 86c7a631fdbc63049611ebde9ac3f0373cd3bdc4f799cb6f950a5af03491ef40