Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1d0b156072f1ea…

MALICIOUS

PDF

48.9 KB Created: 2020-10-14 18:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: db40cd212b14916bebb729c7a6c2fb99 SHA-1: 6d2e349e63822010486d0debd52043b7e4a1477a SHA-256: dc1d0b156072f1eae9f92f3eedcd966db60a9f7b6dea322e4ca8a78f4bf6b3b5
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://gettraff.ru/123?keyword=ragnarok+temporal+boots+guide In PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f86ff929910a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f86f660dc18f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f86fae5500b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f86f4d761046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f870d05c5183.pdfIn PDF document text
    • https://site-1038493.mozfiles.com/files/1038493/34188248707.pdfIn PDF document text
    • https://site-1039214.mozfiles.com/files/1039214/36524612943.pdfIn PDF document text
    • https://site-1044019.mozfiles.com/files/1044019/gajerodaliwanonenejuxumo.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/nudodepajajujugetaxefawam.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/1/0440/3465/4358/files/wagusufagimunonini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6734/9923/files/sunset_bay_resort_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9366/3137/files/27713019692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8158/7095/files/99196772657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7717/5970/files/71621278412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9445/4687/files/cambridge_latin_course_workbook_answers.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_off00007293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7293 5492 bytes
SHA-256: 9460db029417a4292b7e19902d24e737445b2a5a3925734eef721419f47db4c5
font_01_sfnt_off00008521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8521 17776 bytes
SHA-256: 48e5be214c187cf9fafa158f16b938ba3bcaeba13113ca10eded9e0c12bd20f0