Malicious PDF — malware analysis report

Static analysis result for SHA-256 548804c757ba8acf…

MALICIOUS

PDF

36.5 KB Created: 2020-10-15 03:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 586991a8ceda02ae49c0b5d4dcfbf3e1 SHA-1: 7976880be28f48e3f08fe28e3963b87d74266c0a SHA-256: 548804c757ba8acf3831fd022342f674b98cd761d178a98e65f6c753bc2a6eca
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=kopplen+z3+case+manual In PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/e52a51a4.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/8285579.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/febafd3d195a9.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/lokujevu.pdfIn PDF document text
    • https://site-1042990.mozfiles.com/files/1042990/48363150171.pdfIn PDF document text
    • https://site-1039992.mozfiles.com/files/1039992/environmental_issues_in_the_philippines_articles.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/ecb959d2-e85b-41ff-8cbf-5150ea8f7131/7694328430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a0e005-d2e7-4bf2-9f08-7aa2ee3ea3b9/17976129646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0774/4666/files/lonely_planet_italy_travel_guide_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2724/1879/files/gejoligomeporesez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4721/5000/files/homologous_structures_definition_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5564/4324/files/zevufamelid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6915/2673/files/aquaman_full_movie_hulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6572/8920/files/31344801814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/zerawefinis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7724/8192/files/arbys_menu_nutrition_sodium_content.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6637/4316/files/flash_player_for_android_7.1_2.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_off0000517b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x517B 5168 bytes
SHA-256: 2efbbaafa32160679b904e76abcc8f9d562e6b72d6bb1a7756be29a69df79171
font_01_sfnt_off00006302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 10084 bytes
SHA-256: 550618313c07a91c84d81deab8488ecfd04edc34ffb0e3a4d6de071ca89f58fe

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