Malicious PDF — malware analysis report

Static analysis result for SHA-256 34025015c52e1e53…

MALICIOUS

PDF

39.5 KB Created: 2020-10-02 14:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dd36b05f7b75d1c9ce54c8dadaef6bbc SHA-1: 899ee482d4f3e5c4e8645313617d32d1a108dbdc SHA-256: 34025015c52e1e539c24eef752f76c2f2dedcf68313406dfd7cb99c15e12d6d8
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://ggtraff.ru/strik?keyword=geometric+series+worksheet+with+answers In PDF document text
    • http://files.dylanlipke.com/uploads/1/3/1/6/131606835/wijepepi_nitiwuzogid.pdfIn PDF document text
    • http://lepelugan.houseofindians.org/uploads/1/3/1/0/131070355/pirogi-kodakono-pitigevonegome-zanibe.pdfIn PDF document text
    • http://milafof.westsideuta.org/uploads/1/3/2/6/132680835/7733232.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/xowiruvolokibufijosa.pdfIn PDF document text
    • https://site-1037829.mozfiles.com/files/1037829/vawerizogavuve.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/1/0428/5123/8047/files/11948928746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8049/7817/files/ark_snow_owl_saddle_level.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6641/7567/files/gowowazutanuwav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5850/0262/files/20565275435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7014/4158/files/chicco_polly_highchair_lilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/pdf_rent_receipt_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9785/0010/files/wezirarudereso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/journey_house_recovery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/2001_nissan_quest_engine.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_off00005d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D80 5196 bytes
SHA-256: 50554d479e686f179abae56fc432746b7719447a83d814d32d196145107caca3
font_01_sfnt_off00006f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F14 10000 bytes
SHA-256: cc5c60147eea390e907a02fe55b4f0b20bc9cbf5893beb66dae90d81ce3d986c

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