Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e611b64982f847…

MALICIOUS

PDF

43.1 KB Created: 2020-10-06 20:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 430a78c2e69b2d7b81876b36ee67a231 SHA-1: 619302d3522390e185c5d8b9bf3ba62916bd1be0 SHA-256: 48e611b64982f8476eeaa0b3136b8b094244a5f20f8a84d21faa1de1b1ab8441
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://ggtraff.ru/pify?keyword=music+theory+quiz In PDF document text
    • https://site-1042840.mozfiles.com/files/1042840/23293329189.pdfIn PDF document text
    • https://site-1041295.mozfiles.com/files/1041295/58679012002.pdfIn PDF document text
    • https://site-1039583.mozfiles.com/files/1039583/72280391810.pdfIn PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/33508354483.pdfIn PDF document text
    • https://site-1040609.mozfiles.com/files/1040609/tivabu.pdfIn PDF document text
    • http://files.christcathedralfayetteville.org/uploads/1/3/1/3/131398542/senurevalodefeb.pdfIn PDF document text
    • http://nugavadab.carolconnor.net/uploads/1/3/2/6/132696056/kodekapimofi-katekogiriru-nobexezeges-vutosetevum.pdfIn PDF document text
    • http://dafegilig.fivegirlsbaking.com/uploads/1/3/1/3/131382113/suzule.pdfIn PDF document text
    • http://files.truckboardsireland.com/uploads/1/3/1/3/131381302/wulaginit_vuzekajo_gefekozomititib.pdfIn PDF document text
    • https://site-1039778.mozfiles.com/files/1039778/vukamisuxa.pdfIn PDF document text
    • https://site-1037848.mozfiles.com/files/1037848/lozefawav.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_off00006cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 4928 bytes
SHA-256: c35ddc84b08abbff1e53494b76323cb8d10b2a6a677d2e29b5c0af102962bb5c
font_01_sfnt_off00007d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8D 10072 bytes
SHA-256: 9bf3c43493f98c3d9dcf8fe71c1203b27287cd0ed2ff5f23485c17718090f483