Malicious PDF — malware analysis report

Static analysis result for SHA-256 1446724864124202…

MALICIOUS

PDF

71.6 KB Created: 2021-02-24 00:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4ec272f4a833383ea5e6238db353620f SHA-1: 01f7775bcc7059938e69cabfa47b7932aaae5863 SHA-256: 1446724864124202603d102e542a44921994d8e1bad55f4c486bcddd240c26b2
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=research+topics+about+covid+19+in+the+philippines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_600c40dc8d07f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5fd64f2fc43df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_60216316e7984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500187/normal_600dd7114d3d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5fffffa152b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_6019cf40610f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_5fe6f2d0d3fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412778/normal_60121cb7be473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fd177d654501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475737/normal_600f02b736839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_600f48f95642e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/difuveli.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/vijawizironifav.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/what_was_the_world_population_in_1910.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/extra_long_twin_bed_sheet_sets.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_off0000d804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD804 5576 bytes
SHA-256: 542e7737dce7cdb114b9c33314f26d26b5323dab06d362d0d8df88f56f1c5361
font_01_sfnt_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 11356 bytes
SHA-256: d5d2c38a12b4844054f5a49934c1a56a81cd5a9bcc46be86773e7b85b54b2535