Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cb880eb966c5f5…

MALICIOUS

PDF

39.6 KB Created: 2020-11-07 00:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cfa3e4d82025529cdcf00965458ab000 SHA-1: 5264c63d6aafa3458ca71c2f7cdcdf6b33df4c7b SHA-256: 63cb880eb966c5f5b8ddb9e714bfca6a2c576ecdaff2aee03048f4fb94ec00b8
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://traffmen.ru/aws?keyword=power+practice+problems+worksheet+answers In PDF document text
    • https://robivitoj.weebly.com/uploads/1/3/4/3/134334713/ropenikosagipi.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/6327393.pdfIn PDF document text
    • https://kusumuwuwudes.weebly.com/uploads/1/3/4/3/134338751/sejegopevinamalido.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/xupabozividefirupax.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/5230359.pdfIn PDF document text
    • https://gozuvixonoj.weebly.com/uploads/1/3/4/5/134517501/doduxuzifuvinudisu.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/ddda4f32f8f979.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/xipavir/buku_agama_islam_kelas_11_kurikulum_2013_erlangga.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/400-500_leatherworking_guide_gw2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abaee049-8f96-4cbe-a255-aea6f02c63bf/90974977095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad63bcef-ab56-4a55-bdf2-cd599a54e0f6/badisopaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b605fdad-5fa3-4fec-88ad-e99f4b243384/dobazopetijosiginene.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_off00005b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7B 5468 bytes
SHA-256: 55de6798af8d44b2b660e020803e73a62d5109b6cbe1659780f218172da4a9b8
font_01_sfnt_off00006df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF3 10404 bytes
SHA-256: 48efff88a43e513f633cdd5c3ae2850635cf243b486a6c8a3f64c7b59d288bf5

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