Malicious PDF — malware analysis report

Static analysis result for SHA-256 581c2de3eeb49b7b…

MALICIOUS

PDF

47.1 KB Created: 2020-10-03 22:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4c21bbafc0f01062f44215983bdf4179 SHA-1: e977f2a0615bf22d5590ab9ccd1886cd302ac9e9 SHA-256: 581c2de3eeb49b7b499ed14cf81f65ada30eb19a6e6818eba7c0b065053c3a84
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=cbd+pros+and+cons+uk In PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/tusabifivagadamajililefi.pdfIn PDF document text
    • https://site-1038811.mozfiles.com/files/1038811/8807091417.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/69566784553.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/nakasinimativeroxareba.pdfIn PDF document text
    • https://site-1039290.mozfiles.com/files/1039290/75897757548.pdfIn PDF document text
    • http://dimolere.invictainstitute.com/uploads/1/3/1/6/131606490/3332059.pdfIn PDF document text
    • http://files.businesswritingmasters.com/uploads/1/3/1/4/131437728/xinorimiwokubewixavi.pdfIn PDF document text
    • http://files.iflightbook.com/uploads/1/3/1/3/131380875/wunuropizimi-vagonatuxa.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/ziwut.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/66676294693.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/26038688150.pdfIn PDF document text
    • https://site-1040262.mozfiles.com/files/1040262/tisusaxezetunajifot.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/41762713419.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/juxosajapuvedem.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/xajosexajodafonir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D34 5144 bytes
SHA-256: 9123361f78bdb86a1b8ea149a89d2dcc8779d5ddd49534f5dc5f11592b17e95d
font_01_sfnt_off00008eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB3 9784 bytes
SHA-256: 86c28c4b9abc81a897810cb09cbc6d7f1adf2f8ff358848717c8eb03d9eb67a7

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