Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f19c8620c764d8…

MALICIOUS

PDF

35.0 KB Created: 2020-10-10 14:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dc3402e39c2ff694508ac1bff11da5b4 SHA-1: bcec5996f73e32e3c250fe8a8dba431b5da5eaa6 SHA-256: f4f19c8620c764d85b200ad8e335fe1e4dab148ff6df00d98733f857fd1755c2
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/strik?keyword=o+c%25C3%25B3digo+dos+homens+%25E2%2580%2593+jack+donovan+pdf In PDF document text
    • http://files.profiperformance.com/uploads/1/3/0/7/130775732/siratal.pdfIn PDF document text
    • http://files.southernparkandplay.com/uploads/1/3/2/7/132710719/390ac0c87daa.pdfIn PDF document text
    • http://dowor.glenlucetractors.com/uploads/1/3/0/9/130969153/tukugegunuk-piwosimegiworud-tugitudenulanu-gedajufubade.pdfIn PDF document text
    • https://site-1039197.mozfiles.com/files/1039197/povojetatu.pdfIn PDF document text
    • https://site-1038494.mozfiles.com/files/1038494/jibanufatitunemitev.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/1/0432/2007/4663/files/astak_wireless_security_camera_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5844/8534/files/indus_river_origin_on_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7382/4678/files/electric_water_heaters_lowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/lirewiripafigoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/84884996784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3997/6345/files/the_darkness_that_comes_before_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1504/3734/files/55088420184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7448/8986/files/sitejerarudozejiwusok.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 7

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_off0000452a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x452A 5836 bytes
SHA-256: f62dbdddeded7b2b45028959a9f596704f7204d94e4744bad4723c95cbe2aa18
font_01_sfnt_off000058bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BF 12080 bytes
SHA-256: ea99c64f77c6c69a860b2218b67928413d5d6355c3aff107e2d6d8f3aadc779b

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