Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cf62459d25f264…

MALICIOUS

PDF

41.4 KB Created: 2020-11-07 06:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 568c5a17866306c018cc680daa8cba85 SHA-1: 57a095a631a4b91242ecb1976f72658ed24c7452 SHA-256: 56cf62459d25f2642fa00003180389af4c618821d9a9fbce0199b20922cff08c
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://trafftec.ru/123?keyword=dragon+ball+legends+apk+mod+hokage242 PDF link annotation
    • https://nikokitigo.weebly.com/uploads/1/3/4/5/134500207/3995938.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/1603649.pdfIn PDF document text
    • https://miwunukeje.weebly.com/uploads/1/3/4/5/134524605/5291861.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/fidom.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/xurixado/valvoline_vr1_racing_10w60.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/angielski_dla_pocztkujcych_i_redniozaawansowanych_a1-_b1.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/collaborating_and_partnering_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/44341372512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1de1213-ce25-4327-b907-408d87c4044c/23050908757.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/94444464424.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/53188565476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4e7f3a-5a60-4df8-88ee-26a15b718be5/guwamupaxaxosemigemivagim.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/49118619910.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_off00005fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBD 5796 bytes
SHA-256: 2031f2634ecca59494b2f88e490a051c5e0e2fa6a03e82655917cb1d9f39e525
font_01_sfnt_off00007358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7358 11412 bytes
SHA-256: 9ae257b394e0042b99564bab80577624f1925de3d94aa6090866ab7c6cee4a8d