Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b6adae61a2be7e…

MALICIOUS

PDF

42.7 KB Created: 2020-10-25 18:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 32cd6cf0f8c7e5d917ef204a31cb75cf SHA-1: dd59df8865e741bd53f19c33baaf3fe18338aec6 SHA-256: 23b6adae61a2be7e9adadc88a361980ab7438d81739111160e46de1b3d193476
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=solving+and+graphing+compound+inequalities+pdf In PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/6601931.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/8920202.pdfIn PDF document text
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/ef16c77d67e.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/3770932.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/36ce75ac.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/disafetiw.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/7e5304.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/5879865.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/1/0431/9536/7585/files/characteristics_of_living_things_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/file_explorer_apk_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/fopobowal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1049/0022/files/26341683781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6843/1777/files/rock_paper_scissors_c_using_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0851/4974/files/45386540692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/jupejeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/best_med_surg_certification_review_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5491/5488/files/39335543114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9972/8293/files/josibugusofozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3866/8965/files/72927874483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/the_call_of_cthulhu_and_other_weird_stories_free_download.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_off000063f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 5856 bytes
SHA-256: 23e6dd197be20c0c5aa5dd45b2abaa7e0b8d8525f4272d59e95b3eb9097b992d
font_01_sfnt_off000077b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B4 10312 bytes
SHA-256: dabdd6e3e4b3d393115c84a62949dc63534b3b6f17d9120c2e8973c59b88da6b

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