Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0723abec9b9e95…

MALICIOUS

PDF

60.1 KB Created: 2020-09-12 13:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a9462e8e7559c8555a22cf89bed64169 SHA-1: 120f9e7d31ef045d0604d18621121e9d247e5ffb SHA-256: 8d0723abec9b9e95adc4f3197ac3e2269f0581df4264ecc02159d129378abc7a
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/wix?keyword=manualidades+faciles+para+navidad+con+papel In PDF document text
    • http://kired.midrodrc247.org/uploads/1/3/0/7/130776680/6f2406b624332d.pdfIn PDF document text
    • http://siwesul.eminusk.com/uploads/1/3/1/6/131607600/nubipesusopi-laletifeto.pdfIn PDF document text
    • http://tokanov.ifhabworkshop.com/uploads/1/3/0/7/130738971/vupon-nikujiza.pdfIn PDF document text
    • http://bofirad.beautifulmemoriestravel.com/uploads/1/3/1/8/131857315/b36707432a8df4f.pdfIn PDF document text
    • http://gumivob.spice-topia.com/uploads/1/3/1/4/131437046/00c18525a.pdfIn PDF document text
    • http://butotori.embcmanning.org/uploads/1/3/0/8/130873830/todagefelesu-nulasaguxox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0925/1240/files/goku_vs_akumo_full_fight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/baborovowevek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9586/6024/files/90328883081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/subuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9071/4532/files/34573119218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7382/2882/files/bifosaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/quadratic_equations_worksheet_ks3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/zewafirazurila.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D74 5016 bytes
SHA-256: e5c7a51523189843ddc0a22e9e4738d52a02ee62932249058244d40e23df896d
font_01_sfnt_off0000ae90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE90 11740 bytes
SHA-256: bfa3cf82ef37ea108ee684cb6601dcdc0221709ac21d27ce5136c6c3dc2a4c44
font_02_sfnt_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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