Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a2f572123235bb…

MALICIOUS

PDF

44.1 KB Created: 2020-10-11 06:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a0cb46497173b21bd13b3eee3169fffb SHA-1: 5984656e96e54597a7e04354fb5851b82224284f SHA-256: 08a2f572123235bb0aabc1a38d227c2fa13587c6a0e4494d044f56aa1bf05740
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://cctraff.ru/strik?keyword=the+narrow+road+to+the+deep+north+ma In PDF document text
    • https://site-1043794.mozfiles.com/files/1043794/fuludonumixekedefawu.pdfIn PDF document text
    • https://site-1039737.mozfiles.com/files/1039737/94439001301.pdfIn PDF document text
    • https://site-1040145.mozfiles.com/files/1040145/muwul.pdfIn PDF document text
    • http://files.musky-lures.com/uploads/1/3/0/7/130776612/514120.pdfIn PDF document text
    • http://kufuresod.hopkintonathletics.com/uploads/1/3/1/3/131383483/xavuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3b06b2-e2a2-43b6-9dad-1c533d5999b7/59925994098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7190/1347/files/f150_transmission_fluid_check.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/sistemas_operativos_moviles_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0606/6325/files/gobadizitivaduromoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8591/2477/files/kowavizavaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9048/0803/files/didilasofuzukomixat.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_off00007019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7019 5028 bytes
SHA-256: 4346410378b847b81bba41167096d79575386d463a8c123b727f733d5871e81c
font_01_sfnt_off00008118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8118 10220 bytes
SHA-256: f08fce825614c477101f0e674fa2a478d7e6274b6ae887f6fe32c0e3953dd8ba