Malicious PDF — malware analysis report

Static analysis result for SHA-256 0152c755b277832d…

MALICIOUS

PDF

39.0 KB Created: 2020-11-07 10:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 7ce4ed722ce650edfd2ffe986a0b427f SHA-1: 2d44516e398f80f5df6dd680b91e189a313ac380 SHA-256: 0152c755b277832dbf477d97bc2d630d41494aa6f47f2510631596e4796edadb
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffi.ru/123?keyword=minecraft+cheat+engine+hack PDF link annotation
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/4aeb3c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5f9ac8c847370.pdfIn PDF document text
    • https://sibikobibe.weebly.com/uploads/1/3/4/0/134040949/a8966bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5f9b474b557a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_5fa5dcb9634e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fa48e40a354e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407302/normal_5f947cc4a6b9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bobesopaxe.files.wordpress.com/2020/11/wukat.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/28242173251.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/properties_of_absolute_value_inequalities.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_off0000581e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x581E 5000 bytes
SHA-256: 6ffae67b7afd3b833e2728f71ba6d0aea0216ee6abb4f13c5b1d807d5698d853
font_01_sfnt_off0000692f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692F 11344 bytes
SHA-256: a61b31a470fddeaee3bf42ef050d6d49b41103c803fb6c68bcedcef48eeb3cc9

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