Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbe430bd8a14031…

MALICIOUS

PDF

71.9 KB Created: 2020-08-17 13:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bc2d31b7ba5e7d63a7df61d9a209c3f2 SHA-1: ef5f5e87cd002bf7f40a22131b7106692f2a7790 SHA-256: ebbe430bd8a14031affec029fc9b11ac5c6f4e3b8cf89c68e8381457fb258b7a
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.
  • 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.
  • 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://ttraff.com/pify?keyword=android+10+release+time+pixel+3 In PDF document text
    • http://kositun.looselucys.net/uploads/1/3/1/8/131856705/wupavopupufasab_fadamapagup_putagubig.pdfIn PDF document text
    • http://files.ainscoughfamilies.com/uploads/1/3/1/8/131856134/zidiva.pdfIn PDF document text
    • http://files.needforkeys.com/uploads/1/3/1/0/131071157/fujaxevekoxo-xopuvawuwa-lipafipuri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/lunafiragoxomarobomif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/third_conditional_reading_comprehension_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/pibutanobem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/38476555965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/72437979876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2537/5130/files/mexenesezifup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/broiler_vaccination_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/setewuzarofutazudiwowuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/gifugunobuvowukab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/19604575999.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC740 5308 bytes
SHA-256: 7abcb40aca8afb5cfa10665601fbcd063fe67f0b55614481f8cd929b6eeef6b5
font_01_sfnt_off0000d92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 13412 bytes
SHA-256: 6e051a556d43b2340c75bc037b92bc139fb2c4aa68677c391fc16879f8934116
font_02_sfnt_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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