Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2977300741fc71f…

MALICIOUS

PDF

41.8 KB Created: 2020-11-02 04:16:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a88e7473b401163795a83b2147caa7ae SHA-1: cfbecb837ecc01000a4fadee6e083765b4650da7 SHA-256: f2977300741fc71f048c1204671456fef260e74b91368749ba10e725cd2cdb32
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.me/123?keyword=kobold+guide+to+plots+++campaigns+pdf In PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/votajopefap_xulumavavirum_bolasixufewila.pdfIn PDF document text
    • https://pibemalogodozod.weebly.com/uploads/1/3/2/6/132681910/jakunajedosida-tirojewuvino-gijevanufimoxox.pdfIn PDF document text
    • https://leziwave.weebly.com/uploads/1/3/4/4/134446015/vapikarotitu_jetufagufikopij.pdfIn PDF document text
    • https://tedomidile.weebly.com/uploads/1/3/2/7/132712102/pazufososegaruvoko.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/guwaderenel_linufevoroxaf_guzafosone_jodavoxiveb.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/xilasisefi/99668497261.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/australian_soldier_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/a_first_course_in_calculus_serge_lang_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/large_dunkin_donuts_frozen_coffee.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/list_of_important_countries_their_capitals_and_currencies.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/xibeguziwajexozodizi.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/16522163367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/wasewepizobel.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_off000065b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B4 5488 bytes
SHA-256: 130a7a0d6d8e0795654e54a3c3d9599bcf1f17019ee8a6baf7b967f45707b1b0
font_01_sfnt_off00007859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 9852 bytes
SHA-256: 28a298908ccc9d0c391cc77427a4f9f37467af4d7ff2b57a869d44994181e743