Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e101b86df687bf…

MALICIOUS

PDF

48.3 KB Created: 2020-11-02 07:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5dc8637940d3bf11de31f780a39ab551 SHA-1: ec34565e11695e0fecfff903f543bcb21e2ae041 SHA-256: b1e101b86df687bfba896715ab825a751fc597e7f4b2ff101590c36ef21965a5
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://cctraff.ru/aws?keyword=america+vs+atlanta+united+en+vivo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5f97d670501e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f99495dc222b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5f9885e0106cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452853/normal_5f9f5e9fc67a6.pdfIn PDF document text
    • https://xaxexapiro.weebly.com/uploads/1/3/1/4/131453807/58926d5764ebd.pdfIn PDF document text
    • https://jupovibofekek.weebly.com/uploads/1/3/4/4/134490290/nekipumuzup-wazojif-vakanojunur-nufomejajav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_5f9f6b8676833.pdfIn PDF document text
    • https://seriraradekabas.weebly.com/uploads/1/3/4/0/134016679/gederud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4771/5484/files/pathfinder_empyreal_lords.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/61103771373.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/root_chakra_meditation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4324/8030/files/three_letter_girl_names_that_start_with_k.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_off000074df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74DF 5136 bytes
SHA-256: 621621aca86d6447cb9be0aab2503d2fffb913fc5945fefb1c0f4d72514464a3
font_01_sfnt_off00008637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8637 2024 bytes
SHA-256: df64388cf78f87ffdc6493223a7af0745c1c11a74b987b066b04ad77282df602
font_02_sfnt_off00008f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F96 10860 bytes
SHA-256: b90c1f6ea71754f31981a79082a8178953a1a988bb910937d85114bafb11e877