Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23d1c38a73b4a92…

MALICIOUS

PDF

43.8 KB Created: 2020-11-07 00:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: df2841cb3b2643d441fd2e7e98bc1304 SHA-1: c7be1668708735fccb9cd2b8a6fba908a77f9056 SHA-256: c23d1c38a73b4a921999c962c79cb000a49ee97487fea84969027db088652634
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://traffset.ru/aws?keyword=por+15+rust+treatment+where+to+buy PDF link annotation
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/duretazejoso.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://lefawos.files.wordpress.com/2020/11/tetipulanilivolagafaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0812bc2c-b926-4bbb-ae5f-b389ca09e3be/zasotal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0dc579b-6673-4365-8b88-421ca3da8c24/44285158390.pdfIn PDF document text
    • https://xeruluzolu.files.wordpress.com/2020/11/comprimere_un_file_con_acrobat.pdfIn PDF document text
    • https://guwenazepaxu.files.wordpress.com/2020/11/vonopit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eef990c-a5a1-4c44-b081-6217df5c7990/kirby_right_back_at_ya_episodes_online.pdfIn PDF document text
    • https://tilokas.files.wordpress.com/2020/11/ford_340b_tractor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43610a1f-87e4-4264-a3b9-e5c2b86ddc45/rivalumiwilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc973cb-c1b2-40dc-bb9b-80db180aeee9/92431803707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1244e7d-ae27-4829-8a09-7ef9e0296202/96818291105.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_off00005f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8E 5240 bytes
SHA-256: 8a5c11a8d624ddaecb14e25ee0d6d8df78e37a515c0752cc71628836416ad913
font_01_sfnt_off00007146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7146 10220 bytes
SHA-256: 17e3b8e1a8557bbfaf93fa2d6c915534aafc9771d08f68e61f5d63618d8fc6a9
font_02_sfnt_off000093fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361