Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2805e53c20a7906…

MALICIOUS

PDF

61.4 KB Created: 2020-11-04 20:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 0640a128f155193e5a4ab753a9143fc8 SHA-1: c8efdb471112a473513df8bfe2e4d42f0e5c05e4 SHA-256: a2805e53c20a79066b437695a970824ba79018f984decd628d9d09cb4a06e149
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://ttraff.me/123?keyword=spider+man+ps4+trophy+guide In PDF document text
    • https://kijudizi.weebly.com/uploads/1/3/4/3/134321523/399499.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/judife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizufapu/all_games_for_kids_girls_and_boys.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/kegugovupavex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c699450b-6f05-4adb-8e4e-490452c303d7/nasuvutirefaturarure.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/88211841657.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/sesigugerikexetukofawixil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40f1b99-d0eb-4047-9375-c6ba9bbf0817/tuzugirufebiwokogaditusu.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/antimicrobial_activity_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3912b544-51f2-42d6-8fbf-2343f6c2bf0c/belimezakezojeti.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF1 5636 bytes
SHA-256: c72dbd41e54b638364f049a699a90125ee5b17591bd74dc06ae51b1811bb4611
font_01_sfnt_off0000adf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF8 11076 bytes
SHA-256: a141e389e2768ca948984eb3c2a3c5bc4c18b02ec12c482d3d150c5c310e2429
font_02_sfnt_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 16068 bytes
SHA-256: e7273338525a866f49bd556f13a0e46ce1e8513f85f175d9d987aa1f8b89adb9