Malicious PDF — malware analysis report

Static analysis result for SHA-256 740db7c880f47f7b…

MALICIOUS

PDF

48.7 KB Created: 2020-10-18 10:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 21b29a078ba085ba8b6f937084b9e62b SHA-1: f6e88ec3e4f2cc8308602717f978aafab019b40f SHA-256: 740db7c880f47f7b1c2fd596b352bf67527500bb449861ba6fde3c3417d83485
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://cctraff.ru/strik?keyword=sauver+ou+p%25C3%25A9rir+t%25C3%25A9l%25C3%25A9charger In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f8ab0bfc8435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8742c46ba1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8a993b4af04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f87d82139a3a.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/goturelozizese.pdfIn PDF document text
    • https://vafuzetok.weebly.com/uploads/1/3/2/7/132740798/6986838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f88ff6fee445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f877318f1040.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e34627-12c3-49f1-b6b0-2759ffb1c92e/femitolumobisop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8968519f-f611-4075-8425-4cfff339dd21/webitukinogixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d97c8b-5cd4-4ea2-9110-a55f2ab96265/55230134333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2868/4212/files/wow_sea_turtle_mount_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2928/files/matchington_mansion_cheats_2019.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6493 5320 bytes
SHA-256: e69df004809ac67c6ecd250693936b2eadd5eb1f22a9adfb78bf2266434d6cc0
font_01_sfnt_off00007666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7666 12784 bytes
SHA-256: bd63b6036166ab7d795a26ab6daba80301ad6511cab64f9a7f6ab89f28da8f3c
font_02_sfnt_off00009ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA3 16144 bytes
SHA-256: d37ea38084deb19f7a5828c597dc8b9fc086c01dd481d9cf221b2585205fbc4e

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