Malicious PDF — malware analysis report

Static analysis result for SHA-256 b867428c0b9b80c8…

MALICIOUS

PDF

41.9 KB Created: 2020-11-06 21:09:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 00ec4f73356eb0fbbf7e20e1f8e35452 SHA-1: d1173dd9b170a6dbf10554db2f3cb43d1758aff8 SHA-256: b867428c0b9b80c80f74fa8289f815978c634b72c205c9429384bc4e07b5601c
134 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.
  • 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://traffking.ru/aws?keyword=radiating+abyssal+focus+wow In PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/pulod.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/47cae4be6b.pdfIn PDF document text
    • https://takixesa.weebly.com/uploads/1/3/4/6/134621412/16c3f.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/wanim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f992399cdc3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420459/normal_5f9e7b5cd7834.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc450f5-8490-4b91-943b-0fb59432d1d0/xujuvabup.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/tekorovilevipafesek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da310aa1-e9c0-4eba-b037-fb925f079d81/30480680900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/445b55cd-6597-4b4b-b744-0135a4bf1f04/vojenuserujuziwaborolijet.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/covet_fashion_mod_apk_latest.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_off000062f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F9 5436 bytes
SHA-256: e018b4f62d5fa6bbcd02377bfd02dca7054fa09f819bb567d88a9919bfaa6a07
font_01_sfnt_off000075ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AB 10772 bytes
SHA-256: 49159e06659618d6b48fadc444a388b4a4707042d2e795ae7de023bfed425cbb