Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab074812dac2c11…

MALICIOUS

PDF

62.3 KB Created: 2020-11-09 05:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 43cf14189f5c09d264cc39cda3571756 SHA-1: a53a720a714537f1d77d9130d68cf318e2753dc9 SHA-256: 5ab074812dac2c11dbf69c301bf30e0293b73a895caad5d2eb0892b871dbc7e9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=psychic+2020+predictions PDF link annotation
    • https://sokazavuse.weebly.com/uploads/1/3/1/3/131378988/95fb7c216f8ca.pdfIn PDF document text
    • https://sigozebuxofiko.weebly.com/uploads/1/3/4/3/134372047/bexakefumonigafa.pdfIn PDF document text
    • https://fenagedel.weebly.com/uploads/1/3/4/3/134316540/8141789.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/bf54213902ad4.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/bc0ba9a8-fd66-4121-a0b0-dcfe512420e9/najajosepozarodif.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/20643393571.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/ferifoduba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc65eb1d-9fb2-45ca-a020-af46a91d0c4f/pelomevukakusufi.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/laceyville_pa_mayor.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/fha_streamline_refinance_worksheet_2019_hud.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/fuxixajebuvekuzogukupalap.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/mastering_bitcoin_unlocking_digital_cryptocurrencies_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362b5967-512d-4a7f-a236-4bde9b033d91/sanivavabonojazomej.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/jibovazelapulufepemot.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_off0000b544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB544 5296 bytes
SHA-256: 122c61b5f1fbef848131bab9302d9765c3a0f0f269808f626e1538119ac9fdb5
font_01_sfnt_off0000c755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC755 10776 bytes
SHA-256: f7020c428b0beb787a82cbe378be3aa8a0013b9af3b163418081f69efe2a2555