Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb3a5163e7168ac…

MALICIOUS

PDF

61.4 KB Created: 2020-10-05 03:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 48f7fe1e137037ec4da9294784eb5162 SHA-1: 622199b5f9c6d68a7c67cbc0e462e0d0b328fe30 SHA-256: ebb3a5163e7168ac2bc3683dd4f4d34a8e878210009c6528ac9444448df7ef3c
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://ggtraff.ru/strik?keyword=taxonomia+de+bloom+actualizada+2016 In PDF document text
    • http://files.rebeccajaynephotography.com/uploads/1/3/0/8/130813934/5078943.pdfIn PDF document text
    • http://files.juicefastingmaven.com/uploads/1/3/1/1/131163635/4678561.pdfIn PDF document text
    • http://files.mybasketball.ca/uploads/1/3/0/9/130969340/rewujiraxed-sozomipur.pdfIn PDF document text
    • http://files.gabrielsadzewicz.com/uploads/1/3/0/7/130738622/9d0b185af64c.pdfIn PDF document text
    • https://site-1039952.mozfiles.com/files/1039952/xugakulexuvi.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/1/0431/6856/3355/files/back_to_life_program_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1226/2552/files/watujigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1503/7351/files/44604990271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3612/2008/files/the_art_of_listening_prayer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0533/1616/files/zizug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/8014/0188/files/first_aid_usmle_step_1_2021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/3835056920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/34043300571.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_off0000b264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB264 5500 bytes
SHA-256: 7328b0c7e604a3ac07e9851129dc20ade7d997e28f2c6e572386b8b4b5d8552c
font_01_sfnt_off0000c514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC514 10348 bytes
SHA-256: f545dd068aaf3acd3d2810544636002622696cfac0998535592ea6792b9a34ff