Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e23227b9450bdb…

MALICIOUS

PDF

40.4 KB Created: 2020-10-01 15:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4e471c76eb1820caffb938c61bcda4d1 SHA-1: 7e99d2325dd0ba014965668ce236662e6cf92764 SHA-256: 41e23227b9450bdbe4f82325fa19d46595762b994564068097a0a1721edd578b
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/strik?keyword=buchungss%25C3%25A4tze+beispiele+mit+l%25C3%25B6sungen+pdf In PDF document text
    • http://files.theoldvicarageburley.com/uploads/1/3/1/3/131380305/jedug.pdfIn PDF document text
    • http://xamibizo.roweaton.com/uploads/1/3/1/4/131437130/revexalarulepexiro.pdfIn PDF document text
    • http://files.strategyadt.com/uploads/1/3/0/7/130775465/9daaea5c7a111c.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/82968774638.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/87620477139.pdfIn PDF document text
    • https://site-1037268.mozfiles.com/files/1037268/kolivafulewawunajepagix.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/52054683458.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/1/0428/3557/4943/files/what_is_us_indicia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9842/2934/files/97111917085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8046/6080/files/lopomizopet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6860/7649/files/into_space_2_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8856/3361/files/20986578435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/sd_aba_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/tepujipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7428/0855/files/78455121439.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_off00005a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A48 5876 bytes
SHA-256: de802f18577206a2fbee2aedc65597d1dbddaa707f3800fc68cb7162f5f0a5ca
font_01_sfnt_off00006de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE9 11072 bytes
SHA-256: 7af18c73e12427f28bd6653d3ddd5faa3a91ff5fd71756848f22bfb96112ae0d

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