Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a62d16ce57b3c5…

MALICIOUS

PDF

39.4 KB Created: 2020-08-02 09:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0b8ec81a33b9d752a7cd0ebccdaed8a5 SHA-1: 617500b72d46f9f6bc521631186181d766603761 SHA-256: 18a62d16ce57b3c5555cc6834489be8eb62756b9349f43f742dc16eb44f85437
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=ronnie+the+limo+driver In PDF document text
    • http://files.myececlass-growth.com/uploads/1/3/0/7/130740464/zojejava_dupareja.pdfIn PDF document text
    • http://files.hkcofc.com/uploads/1/3/2/6/132683111/lobojevaresale_jojolurirukekof_nunaduwarutare_rulilik.pdfIn PDF document text
    • http://files.goflysoon.com/uploads/1/3/2/6/132682787/kinina.pdfIn PDF document text
    • http://files.pruewalkerfasd.com/uploads/1/3/0/7/130775350/boves.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/1/0427/8976/5276/files/39448649788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/40089827757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/82472320334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/zizulinagudarewibibog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5109/6993/files/94646761179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/zikafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2614/4670/files/pedixujod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/38569843151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/vofilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0011/1009/files/fuwawarawaganubotajazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/pacing_guide_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/tikkun_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/94180857191.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_off00005c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9A 4744 bytes
SHA-256: 1aeec236cf7fdf45734570c18c6bf5869e7dd3a7d92b4dca2368808148884984
font_01_sfnt_off00006c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C93 10628 bytes
SHA-256: 1bcd7b538fbe440ab6d9c198e1f7979e1f1b181579b890a995cc6c5d535a17f3

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