Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b25133fc872417f…

MALICIOUS

PDF

40.7 KB Created: 2020-11-08 08:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5e0d8a2367113e88186bc388aa2198da SHA-1: 73b250913484b8515edac862c6db3d99fd842fb3 SHA-256: 7b25133fc872417ff97461fea05734c7668e79c55cb20c77b8e7f40c7b02f089
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://traffset.ru/123?keyword=prince+harry+song PDF link annotation
    • https://dosijarirolid.weebly.com/uploads/1/3/4/6/134668623/vetokumozo.pdfIn PDF document text
    • https://kepamimap.weebly.com/uploads/1/3/4/6/134609022/rusazakapevidopaxafu.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/xamapebonijos/zopexiwufolidege.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/forklift_certification_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93ae40e-3de8-4d57-a0ec-031ab152788e/18916099080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4914c1c4-dca0-4ae4-8195-75f4f4ee6804/72564517898.pdfIn PDF document text
    • https://livatidepapo.files.wordpress.com/2020/11/wadadiwodogeke.pdfIn PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://tezebotum.files.wordpress.com/2020/11/tarijekabafigaluwanadivaf.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/business_level_strategy_and_value_chain_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/google_sketchup_for_mac_free.pdfIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/340d8ae0-3918-4663-9d24-38cbe24c7b50/dveloppement_limit_quotient.pdfIn PDF document text
    • https://suluximem.files.wordpress.com/2020/11/fefanede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8845d6e7-4bca-44cf-9b43-48319a4b0f2c/alleluia_lumire_des_nations_partiti.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_off000062a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A4 5132 bytes
SHA-256: 4133fb5f7c5948d4f95ad877c867ffcf06e7480ecee9ea5be6919bb279b364c5
font_01_sfnt_off00007420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7420 10244 bytes
SHA-256: 83451cbf1444d6c211958c504a9c10a5892a38f692072274f97fa22fe60ab798