Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe5f75a0940a29e…

MALICIOUS

PDF

43.1 KB Created: 2020-08-16 23:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d932fcc32d402bf00bcc7776f94aba94 SHA-1: f2312c871f0b361429723d289472aab0b72042de SHA-256: dbe5f75a0940a29ef31705b7fb68e0a3b85c24555c9d62d759e46e17126a1438
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.ru/pify?keyword=alien+vs+predator+extinction+para+android In PDF document text
    • http://xovufo.jfmusicproductions.com/uploads/1/3/1/3/131384401/328968.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/1/0432/4818/9603/files/6714718454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3880/files/final_fantasy_15_guide_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2537/5130/files/basic_engineering_circuit_analysis_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/lokor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/42108857713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/7919/1966/files/6973461782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/bakifufawakodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/how_to_highlight_on_ipad_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/sazavagugogarofusefuvefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3779/4204/files/72793998968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8883/0873/files/kapejifugerapewit.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_off00005d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3E 4972 bytes
SHA-256: 999cec23c69297882fa36986018c3fe3db600e93749dc86b03654cb494430365
font_01_sfnt_off00006e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 10252 bytes
SHA-256: 2bfda2a39d9b8dea387c318133cc14a9996b2c78d64e9df41c915311618f842b
font_02_sfnt_off00009137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9137 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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