Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5e8c669c0dc358…

MALICIOUS

PDF

43.9 KB Created: 2020-10-07 01:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 83f9caa8667fb981621b5837ed54e570 SHA-1: 0a28874195d5012c84fcddaa1e2499b65b73dcef SHA-256: fc5e8c669c0dc35819351a0f24ccb3a24b46c4409ee32110dd2899bf854a85f6
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/pify?keyword=dry+cooking+method+terms+worksheet+answers In PDF document text
    • http://files.goodshepherdinoshkosh.com/uploads/1/3/0/7/130738755/wexiwexabij.pdfIn PDF document text
    • http://files.theothershoe.net/uploads/1/3/0/8/130874588/nafibojarapi.pdfIn PDF document text
    • https://site-1048530.mozfiles.com/files/1048530/25467516866.pdfIn PDF document text
    • https://site-1042514.mozfiles.com/files/1042514/68556165019.pdfIn PDF document text
    • https://site-1043311.mozfiles.com/files/1043311/vuxunifuwuvimawolowa.pdfIn PDF document text
    • https://site-1039227.mozfiles.com/files/1039227/10499574883.pdfIn PDF document text
    • https://site-1039903.mozfiles.com/files/1039903/kelakubovef.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/1/0479/6648/6684/files/nominative_case_pronouns_german.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/4766/1980/files/sozokudagobawuluzuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4353/2185/files/legend_of_zelda_a_link_to_the_past_rom_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9859/0372/files/87803124817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9173/files/ritutuxuxikategutebow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7523/4720/files/jar_to_apk_converter_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/seamless_water_bump_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9127/1073/files/59335285671.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEF 5576 bytes
SHA-256: 8359a4f1e0baac3fa7b64dcc61ed1d52e60d29401368fd3c6e4720c233271187
font_01_sfnt_off00007ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE5 10280 bytes
SHA-256: c4d9acfd194946c85f37782239f7cec476edabbcb0b168108aaf123a44e2bde8

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