Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ace4c18fe8e85e…

MALICIOUS

PDF

39.1 KB Created: 2020-10-09 00:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 90ae97237ff51d7b43382ec99886f9b9 SHA-1: fbae3feed6f34a83de81da07d8c3381fa682d939 SHA-256: 74ace4c18fe8e85ec334e4e9c54dfbd8c4950416312f13e739495dc63dadd62a
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://cctraff.ru/strik?keyword=beginner+piano+sheet+music+pdf+free In PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/19824269801.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/nupiworobutujoju.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/vojizewaxer.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/tafimavezapamerag.pdfIn PDF document text
    • https://site-1039207.mozfiles.com/files/1039207/37486504841.pdfIn PDF document text
    • https://site-1043087.mozfiles.com/files/1043087/77949156455.pdfIn PDF document text
    • https://site-1038552.mozfiles.com/files/1038552/47510334729.pdfIn PDF document text
    • https://site-1042920.mozfiles.com/files/1042920/nonoxituburuvurusedo.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/jelovefarevokilep.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/xovotiji.pdfIn PDF document text
    • https://site-1039651.mozfiles.com/files/1039651/wexujenolopepababiga.pdfIn PDF document text
    • http://files.teslniagara.org/uploads/1/3/1/8/131871902/623649.pdfIn PDF document text
    • http://kozoxasi.houstonmiddlepto.com/uploads/1/3/1/8/131856959/zanujoz_gewud_nopanivuw.pdfIn PDF document text
    • http://files.the-songbirds.com/uploads/1/3/0/8/130873957/fawagot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE5 5468 bytes
SHA-256: 0a0032e5f91ab41cc1bd7fd8433977535d64f48dba2b68b0b5dcaca2a3d8e7ce
font_01_sfnt_off00006048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6048 9680 bytes
SHA-256: d4a33b450b9f31d0cc97c99e3af81760391529f86e3d50a2be898ea070bbccb9
font_02_sfnt_off00008166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8166 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3