Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e599bb372f73d67…

MALICIOUS

PDF

48.2 KB Created: 2020-10-01 05:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b2b790227b70c4bacb00e086f4a2de18 SHA-1: efbf131b9fd72bb675e3db5e50a0ec124c547929 SHA-256: 9e599bb372f73d676aefb0ccaf4495f6a74f5dae83bb75f1d631860abb6a87e8
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=convert+base64+to+pdf+angularjs In PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/60729028650.pdfIn PDF document text
    • https://site-1036681.mozfiles.com/files/1036681/bawojanoroluzejudujupo.pdfIn PDF document text
    • https://site-1039275.mozfiles.com/files/1039275/tokajoxumuxasodupaza.pdfIn PDF document text
    • http://gigudagi.medwayqueen.co.uk/uploads/1/3/1/4/131482995/dafojogune_xiduwid_nufedipevo.pdfIn PDF document text
    • http://napaluje.sieglindemcgee.com/uploads/1/3/1/4/131407836/teteworazebinu.pdfIn PDF document text
    • http://files.seesarahstiversart.com/uploads/1/3/0/9/130969695/nowuzakidozidu_fapegi.pdfIn PDF document text
    • http://nonupuzak.merrymeetingartscenter.org/uploads/1/3/1/4/131453950/baruluwex_dogijosugilape_zoloruzox.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/1/0440/9432/4888/files/85186601204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3874/3450/files/bogan_movie_bgm_ringtone_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/vuxopogovugafirezaruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0829/4044/files/28762648143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2838/8772/files/roxane_gay_hunger_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8738/7037/files/masavamileminenibanan.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_off00006ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE2 5632 bytes
SHA-256: 5c5cc667880153ae9268cc252409d8323cd7497b63ff86d1d2223abb434ff176
font_01_sfnt_off0000822f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822F 15828 bytes
SHA-256: 40a3f63e37721166cf626e65520a809bfb2081618e0e79194107ef7dbbcb9fd4