Malicious PDF — malware analysis report

Static analysis result for SHA-256 291aa6a7233c1025…

MALICIOUS

PDF

44.9 KB Created: 2020-08-01 09:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0f729ab2b60b983027e5e5b94aa7a263 SHA-1: 4486e5dbc3e0da67b8040cfcd54d47974aa9a021 SHA-256: 291aa6a7233c1025faccfc20f5d079f87f557ead7e8551b6142b00ad80aa9367
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.cc/pify?keyword=convert+hours+to+seconds In PDF document text
    • http://files.beulahbaptist.com/uploads/1/3/1/4/131454791/0197ac8207.pdfIn PDF document text
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969209/giwuvizalapunemaf.pdfIn PDF document text
    • http://files.powderkegfarms.com/uploads/1/3/0/8/130813042/giwiparotobiruni.pdfIn PDF document text
    • http://files.northernillinoispainting.com/uploads/1/3/0/8/130814308/viwiwevamod_kawomudijuki.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/1/0428/3806/5308/files/93518317082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/78695806102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/givinavub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/9945325406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/27299310354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13908697451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/33844441851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/9699819530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/60211504873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/80128047369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2658/6519/files/kerimokalutomomozogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7107/0617/files/xufidakogolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/347399415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4346/2037/files/calicatas_de_suelos_agricolas_pdf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6069 4748 bytes
SHA-256: a3270b9b448edad18a4b45e05a9d701ce2195155e817739816b7e4c956383eff
font_01_sfnt_off0000708a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708A 9560 bytes
SHA-256: e83933c6c415a862ffa2af3da1327abaec347bde3091bd21a70837edddb7ed2c
font_02_sfnt_off0000914f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914F 16216 bytes
SHA-256: 9aaf374d64521945a2d179b3de22a0ad451813c1e8d23897d9514ef9876b453b

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