Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa5897aea2c857c…

MALICIOUS

PDF

72.5 KB Created: 2021-02-16 00:07:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0b39b121c182fdbc295e44e8046c83e0 SHA-1: 4016d3f71a610319755e42c5b8c873ba75355e61 SHA-256: 0fa5897aea2c857cfc22f72c1f0bfab725eb8e2cc7afbb2efd9c3752534f27e7
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/aws?utm_term=nikon+coolpix+p510+macro+lens PDF link annotation
    • http://vozaxakinexu.iblogger.org/animated_instagram_stories_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503309/normal_5feff3f92815e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420924/normal_5fcda071cf6fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5ffb407c4a4d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462992/normal_6002036c42e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_5fd1b761c4caa.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/ggj0zgd/vusimiw.pdfIn PDF document text
    • http://spiritstudio.ru/dasagakozh5ddo.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/hjChahf/rafodadexowovolemubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5fd8b8da7cccd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450514/normal_5fe4a6a3335bb.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/gudukupir/avast_free_terbaru_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/ceiling_sheetrock_thickness.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/gejonukakogitajesuvido.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/christmas_tree_paper_chain_template.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_off0000ddd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 5500 bytes
SHA-256: 934e482ccfaa427dca79c80347cea9cbb2ea4e29ea215179ec86fc3c86fa8c80
font_01_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 10804 bytes
SHA-256: 5fb357ffbf572a1d2b41ca58d1b83d17a348516e66b40d715e0ca397fab43240