Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6519a924b4fcdfa…

MALICIOUS

PDF

40.0 KB Created: 2020-10-12 02:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e1b3a3275b7775af5ec4dea079adbf4f SHA-1: 2cc3462c941aeceeb48fc948d3a767d8669e3f73 SHA-256: c6519a924b4fcdfa362a0108ee59bb65e7174b8ef2c4d3de417114316b04ec5d
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://ttraff.ru/pify?keyword=410+shotgun+for+sale+in+maryland In PDF document text
    • https://site-1038998.mozfiles.com/files/1038998/fiwakufowi.pdfIn PDF document text
    • http://files.bayareaflightinstruction.com/uploads/1/3/1/1/131164160/govawulizavikubaki.pdfIn PDF document text
    • http://files.michelsacademy.com/uploads/1/3/1/3/131397964/gaguvi.pdfIn PDF document text
    • http://xafim.unostradivariperlagente.com/uploads/1/3/0/7/130776321/xakokef.pdfIn PDF document text
    • http://migaromi.littlecharmers.net/uploads/1/3/1/4/131453540/rovijipetoredisezone.pdfIn PDF document text
    • http://zoraj.annagayatri.com/uploads/1/3/1/3/131384613/32efeb8139.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/1/0431/7960/6176/files/matalelalejuzujezupiwot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/dream_corp_llc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7050/0263/files/kilosibuvozovikaw.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_off00005b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B72 5612 bytes
SHA-256: 24f677776ba3642696c25cdd26abbf4a6f6b162fc01c04584d04c35acd9be7d4
font_01_sfnt_off00006e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E60 11000 bytes
SHA-256: 63b7c8065f4ad0305ee59cbd3196addcb63242078a46a9b544e6871c19fb7b1e