Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f056cc63f12e28…

MALICIOUS

PDF

40.0 KB Created: 2020-10-03 11:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d0b727b080c10ef515e19497a81a8c12 SHA-1: 32578ec4e8b5032e9a1b83893c43460b2b942aea SHA-256: c9f056cc63f12e2803d81aa9328fba0d3ede1ee583572d8162ffb4163230c3b6
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.com/pify?keyword=red+golden+retriever+puppies+for+sale+michigan In PDF document text
    • http://zonibevog.quadcitypoker.com/uploads/1/3/0/8/130874049/sidekefujebu.pdfIn PDF document text
    • http://files.erinmcbrideafrica.com/uploads/1/3/0/7/130775797/83e02f2c1.pdfIn PDF document text
    • http://zezuzepul.isabelleclayart.com/uploads/1/3/1/8/131856979/9719649.pdfIn PDF document text
    • http://texom.eurekaloggerfootball.com/uploads/1/3/0/7/130775987/tobizo-kutaj-dopet.pdfIn PDF document text
    • http://files.vcarc.net/uploads/1/3/1/8/131871587/6561102.pdfIn PDF document text
    • http://files.theabcofchrist.com/uploads/1/3/1/3/131382700/4601327.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/1/0439/4260/9051/files/1638542605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9785/0010/files/91398704262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/century_battery_charger_model_87001_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5301/9036/files/deactivate_rosetta_stone.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_off00005ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC0 5636 bytes
SHA-256: a36f4afd38ee9776df9f95fbdcaf372a4e41b25031dec3bbae6c19d7125f8dcf
font_01_sfnt_off00006dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD3 10488 bytes
SHA-256: c769a6325ade3f592328e75fc4dd53562a21e87b8dfa5e09b1d80411c6e57a32