Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab171850cf08f49…

MALICIOUS

PDF

48.7 KB Created: 2020-11-03 06:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 99fb76fb1a2765a10296eb119240b851 SHA-1: 6f4c73892b3b79937a03dd8f65fbe197bbd34a1a SHA-256: eab171850cf08f49efb9ad634de0aab3c9aa6736358a86889f49a6c0d5f0df5b
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.me/123?keyword=golf+clash+hacks+2020 In PDF document text
    • https://tifunubuxeji.weebly.com/uploads/1/3/4/5/134523212/mojasab.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/07e0ab5.pdfIn PDF document text
    • https://dasateju.weebly.com/uploads/1/3/4/5/134582383/529c45dd936dbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_5f8b00c17c33d.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/wonukanugob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_5f9bdf4406089.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000075ef.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000075ef.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a84e.bin)
    • https://s3.amazonaws.com/juxatop/wevilimekegukomodexi.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/madugesegiwozuruliwofiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8794/5622/files/97390412530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7411/8325/files/properties_of_metals_worksheet_ks3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/2759/1863/files/algebra_1_final_exam_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8914/2968/files/census_2020_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/gmail_sign_up_new_account_in_computer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7755/6629/files/5th_wheel_to_gooseneck_adapter.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 extracted file (font_00_sfnt_off000075ef.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EF 4676 bytes
SHA-256: 008441600c84b347ef04a9bb7f7e3bc9d3bbf271bf2fccb1da8597fc3bb93270
font_01_sfnt_off000085d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D5 10088 bytes
SHA-256: 6f2ac85a1f8c414da15658c0929417c58e93089b079b65067eb0130aa8bee304
font_02_sfnt_off0000a84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA84E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3