Malicious PDF — malware analysis report

Static analysis result for SHA-256 698b59d74634be62…

MALICIOUS

PDF

44.3 KB Created: 2020-11-04 10:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5b2375e2c2b6eb6a0d5bc07ce0f98dff SHA-1: b9b190e682e183d5c28c91d7c7758d1b7c1e5219 SHA-256: 698b59d74634be6218f42514decd96d39e741a8f435f12256fe7a846994b85c3
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.cc/123?keyword=words+beginning+with+loh In PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/1376720.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/majajisanolaxokime.pdfIn PDF document text
    • https://gilolubirej.weebly.com/uploads/1/3/4/3/134309297/5fd00f80764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f9944e493a77.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/ludaxu_fekenev_rakodujifured_tonofigekususij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5f98c384db75b.pdfIn PDF document text
    • https://jojimixumomural.weebly.com/uploads/1/3/4/4/134438106/joselevulesazo-defodu-dijamutikeva-xuminozakadet.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/99b97505-f6b4-46ac-a7f2-44140a714bb8/33450166557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43930013-297e-499e-ae70-5379dafc640a/54076399023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dadb9232-c40e-4be1-ada3-3e4df2dc1cd7/dafeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69d2bf0-3836-4f9b-bc0d-c5daa43d356d/47910888242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55cf843a-ae25-479c-9b3c-8ce3d876241b/xipoledolorupewulol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5e9fea-07e3-4600-8019-93c7269bc506/22350991961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4149913f-8782-4b9d-99b0-b1837e586c44/fefovufun.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_off00006e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 5124 bytes
SHA-256: 73df50644738e373e096c0191ac77caf6b152eef98e005280e19b9278eb7dcc6
font_01_sfnt_off00007fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE0 11556 bytes
SHA-256: 47b3fe96b11a1ab141de82606eb36c841f96cb4bd22a4ed3d7ce81e9c0341041

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