Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f45315fe3bbab9…

MALICIOUS

PDF

46.3 KB Created: 2020-10-15 01:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f13ed9df6d9b48765f0523bd111fbeca SHA-1: 542f8584581dc23b013b5d4c678f8ea52c0368d9 SHA-256: b1f45315fe3bbab9b11c17bcfa58323e504f1fe02fbb8bf3a27027621aa9b3b0
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://ggtraff.ru/123?keyword=international+relations+journal+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f87591467c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f876b541882e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f8758055755a.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/facebook_phishing_app_apk_free_download.pdfIn PDF document text
    • https://site-1042620.mozfiles.com/files/1042620/kupugorizogojuvef.pdfIn PDF document text
    • https://site-1039757.mozfiles.com/files/1039757/fujalamadejodewitoze.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/1/0501/0302/5840/files/time_warner_cable_desert_cities_tv_guide_warren_ohio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7882/3317/files/real_estate_investment_prospectus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3497/9751/files/guava_paste_recipe_epicurious.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6762/8440/files/21580029270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f303063f-481f-4ca7-bf9a-87bc3c2416e7/mujejusivino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd69bc4-6fb8-4693-b427-bf60985cd97c/misap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe57bf6-1949-4569-9417-5fbf2e83a9a1/16528852554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f13e302-2ee1-4449-be13-b87ecb962aeb/dobowevulekekoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce0bc25-4cd3-47b2-972d-798264fa3066/57098077793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11c8007-e4a9-4e6d-8441-8b7858192acb/90072524181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73156190-6a9a-49c9-a39b-b8f6b6a6ed6d/valanudozemiwevefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6a604c-a58b-4b2d-9dfa-d4635dbe3b53/94696243557.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_off000077bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BF 5048 bytes
SHA-256: ca34ad4d8e45f5d9bee7d324620798a3dee32737340064a4c5db9b1b515150aa
font_01_sfnt_off000088f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F1 10304 bytes
SHA-256: 468442951cdda437db2c8cd62ddd797ed639e8e4d258c8f8e5328124f0d4e294

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