Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad574776c47876fa…

MALICIOUS

PDF

36.9 KB Created: 2020-11-09 05:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fc1e5d803eb1508a3c44d5ef26a56ea6 SHA-1: ec6df8eca7fcd3fc22d52098cb2bd37feefa2a64 SHA-256: ad574776c47876fabb15bdb3c0f332e75af6b255a68d2e7968962a303ad1c5c1
142 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?keyword=aao+transfer+form+word In PDF document text
    • https://bugemimeme.weebly.com/uploads/1/3/4/4/134403979/gibuxuma-panidademojusif-zolesores.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_5f9c5c893a136.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec515783-8bef-48fc-ad7e-a52c67f1c449/verine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c722ed4-bd51-4ba6-a1f8-97fc77df952c/54224728483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377fe4c8-9a9d-49b0-a42e-958eede083aa/43517978091.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0283dc13-67ab-451b-a394-29f7cd5b987b/natelezofefururigerazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6fd19c-f9c9-4d52-9a2c-e28f08ee89cb/dead_man_s_folly_1986_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acaf43a3-0414-41dd-8a9f-2200db563485/bitopubafipijavazamimurom.pdfIn PDF document text
    • https://mewidugeko.files.wordpress.com/2020/11/60721874492.pdfIn PDF document text
    • https://momuvabixot.files.wordpress.com/2020/11/abnormal_psychology_an_integrative_approach_8th_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ae3fc7-0f73-445c-81e7-ff645535ccc8/64446684552.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_off00004efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFB 5100 bytes
SHA-256: 6d1a244b5c514bbdd0133f828e7e739e35d997105c4bc13c7a1abcef9eb26a25
font_01_sfnt_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 11804 bytes
SHA-256: 4902813df5fb0d91473f57f62c51e51bc05db15cd3277bec2307ebd5ff6ce152