Malicious PDF — malware analysis report

Static analysis result for SHA-256 aada06a2bb3b34ac…

MALICIOUS

PDF

36.3 KB Created: 2020-11-05 01:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 84a4458e43fdcf0157fba150bb776dcc SHA-1: 3ca252f113c3122e39adf856167b31d545ca03bb SHA-256: aada06a2bb3b34ac4ac436838f630f386779c2f3ac808d5b2400db6228732ae0
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?keyword=indefinite+pronouns+worksheet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403259/normal_5f94675513e38.pdfIn PDF document text
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/1e41d5c62.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/292d1ce5-f7ec-48ea-8fdd-a71500d8e94d/fabanekadarotunejuxeg.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/2353739039.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/list_of_asian_countries_with_capital_and_currency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3e846d-223d-4f25-abc7-a9cb28a78701/samsung_ml_1670.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/nivodateminijadumopaz.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/69870894741.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/articles_of_confederation_worksheet.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_off000050a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50A8 4980 bytes
SHA-256: f087891ff73c6bfb420befb4ef339e637c07f3559eb2b0727193b6350384f814
font_01_sfnt_off000061b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 10332 bytes
SHA-256: 0b016e1454e3313dd1cbbe831d1e22110a7497244fa33e97dcbdd0e58c3f1a7c