Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1721d9960c757c…

MALICIOUS

PDF

40.7 KB Created: 2020-11-09 15:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b37a58ca35f4670aabefb6ed01aba118 SHA-1: 602c89432226934a1b9131b3c3cc55fedd4e4078 SHA-256: ff1721d9960c757c4fd61ea0e912e0163559ad3ccd90b8e8ac70d85390fa9c10
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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/aws?keyword=60+second+burger+run+cool+math+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412909/normal_5fa6582527758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5f9e0ac05e491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f977cec52b98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446770/normal_5f9f77f25c854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fa223ee5deda.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/kavitokolezub/72062616615.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/king_size_clothing_for_men_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/xewifirotosobivat.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/tea_party_voter_guide_2020_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/gartner_application_security_testing_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/rovidipisabumelemoworoto.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bowokemopinogezotekutu.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/511_cpu_fan_not_detected_z420.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/xulej.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_off00005d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D80 5692 bytes
SHA-256: 9d3e87ec101d91310ed2db4002170376851afb1e29b1246a91744a4283118e2d
font_01_sfnt_off000070a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A2 10896 bytes
SHA-256: 10cdf0e0871fab640666f445ab75af8c273696c8b2c0cf229dec37df088fff28