Malicious PDF — malware analysis report

Static analysis result for SHA-256 a499c01b159e6fed…

MALICIOUS

PDF

49.5 KB Created: 2020-10-30 16:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 1f31bd339ac7c8e3a4cdea314f953029 SHA-1: 80b75a30b5c34f62f528dd0956c43435318fcaae SHA-256: a499c01b159e6fed78dcfbb3c0cbe4659099982cc37f69cc39b1ae558ccfa3d8
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.link/pify?keyword=dark+heresy+2nd+edition+enemy+within+pdf In PDF document text
    • https://sobegivi.weebly.com/uploads/1/3/4/3/134311910/9d88f72.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/birozewila.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/297c0.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/govubekafekipud.pdfIn PDF document text
    • https://xoretesani.weebly.com/uploads/1/3/4/3/134315313/9bf6467e6dbfbbe.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.pdfIn PDF document text
    • https://kifelulamexeb.weebly.com/uploads/1/3/4/3/134310841/najitame.pdfIn PDF document text
    • https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/dovunixepowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000802b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000802b.bin)
    • https://s3.amazonaws.com/zuxadol/80740569845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2216/4383/files/woses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5443/1893/files/74271290078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5369/8202/files/98007879582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8583/8536/files/54222070810.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/wellcare_wellness_rx_pdp_2020_formulary.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 extracted file (font_00_sfnt_off0000802b.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000802b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802B 5640 bytes
SHA-256: 5dfa4a9081bcfaff439862403b72653a302e642104210c0ef5395515754c9725
font_01_sfnt_off00009351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9351 11188 bytes
SHA-256: 5a034c90cd3f2861a16aa14f71791b8cc9a17c2cd74a36b254982429d013443c

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