Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ca374ed61b86af…

MALICIOUS

PDF

43.6 KB Created: 2020-10-17 00:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 332eb946133a86f1f435051da338bfcd SHA-1: 393245e1420af84c6ee7b5326bfcc17a47ef6898 SHA-256: 45ca374ed61b86af6ee05741ae7906aa49e507f1654b0751e3c171c28dba8c3b
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.ru/123?keyword=deschutes+national+forest+map+pdf In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/6463617.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/1/0430/7111/1330/files/jofokekefidukasuniba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8770/6774/files/54910414246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1623/5419/files/construction_materials_methods_and_techniques_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/star_girl_christmas_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/swantex_napkins_3_ply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4a0b21-9f80-4cfa-81c7-f3e7abb9d1d3/98723609392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d87a806-eb98-4e91-8f9c-7b5c17891ad3/42718673393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72925d7e-09ef-48b6-81b1-c710a06e8901/52871505957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00268ef4-5e74-4b27-8603-849829206548/31456398443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aad3f39-cefd-4ba3-9825-5779f91ecc2f/nivobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1222f964-352c-4dff-bf2a-1386796f9370/duzidofakufox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8ad9ad-d745-4f0d-ab02-db52abb809f1/79170003161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10df73c-9401-407c-94ea-817bacd1eb99/48701288334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d49ac5-903d-4002-aeaf-f11f3627ba28/5368157889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/farberware_6_quart_oil-less_fryer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5673/2591/files/rrb_group_d_exam_pattern_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/halstead_finest_boiler_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/45859236668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/banolifukilisimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5236/6496/files/ferrochrome_production_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2543/1709/files/biology_midterm_review_quizlet.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_off00006b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B83 5396 bytes
SHA-256: 0343ac19ae5250ddcc304e0be7da270652b82a247da7ca095cf418ff8d8670bc
font_01_sfnt_off00007daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAA 10352 bytes
SHA-256: cc0b2be97fcc55db94224de9c6f063766290d43ab1e665fb082c56f15fc77d31

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