Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d31508bed72c957…

MALICIOUS

PDF

49.9 KB Created: 2020-10-31 23:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b18172689e4988e0d077d10328f1d9f2 SHA-1: bbade43beb3fd0504a895545a6f361781b77d1f6 SHA-256: 4d31508bed72c957226c2c68434cba0ba95c3f071f91f8fdf7273b56b4b71e64
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://ttraff.me/123?keyword=madden+nfl+hacks In PDF document text
    • https://wevinavuligi.weebly.com/uploads/1/3/4/5/134505150/sanotogedobibavujas.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3006570.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/tunaz_witeruz_xejuluxizefu_nixesuku.pdfIn PDF document text
    • https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/000c5a569.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/vexosafugunu/kokodajezanozom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40847593-e2d7-4aca-8211-3b595832abb4/lolovoritudufamazum.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/resealable_plastic_bags_small.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4706d941-3edf-4c15-8909-017e83ff6cd6/76989151661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8750/4583/files/photoshop_smart_object_not_directly_editable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3032/files/apk_streaming_live_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/enid_blyton_the_enchanted_wood_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ade9b9d-36cc-4a74-be1b-428ec1134822/nefekopig.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_off00008556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8556 5084 bytes
SHA-256: 97f385b12af78537bd83d118c9cf468e6d0dfc466d586c7f64dc0eed532a5871
font_01_sfnt_off000096ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AE 10784 bytes
SHA-256: 53ec8f228ea5e443ccb68b737ad663ae317d7ea89a3a0c975bad469df313ba62