Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fbe44938ceb4b9…

MALICIOUS

PDF

44.2 KB Created: 2020-10-23 07:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 621ab61d3318163a17ffe5453e29629f SHA-1: 97e85b3dff792489ec91c86bef6425762343a57e SHA-256: 05fbe44938ceb4b9fb2472c60bccc5c38ee0adf698248ccd04962d7fc358aba4
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.club/pify?keyword=fuji+x100f+firmware+update+instructions In PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/kolopinipaxofep.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/8084488.pdfIn PDF document text
    • https://rusezoxebob.weebly.com/uploads/1/3/4/3/134355184/9462087.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/ruvejipomuwekixuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5f8d1100d5691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_5f921120e7a2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f89564b17fb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f8b02401d88c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8a1624bdd1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5f8ff1816c098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5f8c81842b78d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5f92103108306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/api_527_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/losobotolemixalilesuge.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/pijurenusekanudedukowaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/lugodumiperunederisamajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/nofekuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/mizezorusamaduli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/64978792833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6597/4440/files/11344396105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/8152609665.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_off00006a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A90 5652 bytes
SHA-256: 3fd1f8e68df5dc6432b1553670a0ae162f76124184f849eecdf0637778989e88
font_01_sfnt_off00007dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCE 10964 bytes
SHA-256: 3bf0c30ceff89dc0a3a66ca4db3d77e670eedff25701f879918b496af660d203