Malicious PDF — malware analysis report

Static analysis result for SHA-256 805a128f43455685…

MALICIOUS

PDF

45.8 KB Created: 2020-10-04 08:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2631f3dd431e4d268866a6091f6b394e SHA-1: f9f3d9ad0b86be4eb27d64849da2c134e08bc749 SHA-256: 805a128f4345568527e9b7786b0973c83d316a39ff7c6325080e6deb91a204d2
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/strik?keyword=how+fossil+fuels+form+worksheet+answers In PDF document text
    • http://xafenuz.massinnofcourt.com/uploads/1/3/1/3/131383409/tatuko.pdfIn PDF document text
    • http://nopujes.radmtfitness.com/uploads/1/3/0/7/130740164/3181591.pdfIn PDF document text
    • http://lefiliz.tildenhouse.org/uploads/1/3/0/7/130739256/dff35f97e7f.pdfIn PDF document text
    • http://files.westottawawrestling.com/uploads/1/3/1/4/131406947/favurivuzumu.pdfIn PDF document text
    • http://files.flindersparkchiropractor.com/uploads/1/3/0/7/130775465/dikoge_wejoxum_wujudevofa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/161ad568-cf96-48a6-b7d4-b34e6b4b0381/dixib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61cf730a-d1f9-4dae-a28a-a1cf77ea2a4b/77927776606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/kawunurobogoduxotimokaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/town_of_mattapoisett_assessors_database.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/Image:Oil_well.jpg,globeIn PDF document text
    • http://en.wikipedia.org/wiki/ImageIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000692d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692D 5008 bytes
SHA-256: 33f5988aeac5fdab71e75b9a4a2e9b1951389cc430ac0c8b41c6edb5ca645326
font_01_sfnt_off00007a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0C 10084 bytes
SHA-256: f101e2b532f6800c5575e29ce8ed53843d54ba91c3e9377d578fab5e8f0176d4
font_02_sfnt_off00009c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378