Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6138eb75ab25de7…

MALICIOUS

PDF

44.0 KB Created: 2020-11-06 21:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 065ceb38412d3578e59c3a6b13982a4b SHA-1: 5de9d82a21ebc38d9e5bb01ed1b8f767414d42c4 SHA-256: b6138eb75ab25de7eca8721dd64c112151a6695e2df78eb8525442d0ee6a4bd1
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffset.ru/aws?keyword=cms+infection+control+worksheet+2017 PDF link annotation
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/eeb6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5f8c529a8dda0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5fa1c89229ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8d7b8b01bc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8a1629d8fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f8f5fb56cdea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_5f93a6e27cd6e.pdfIn PDF document text
    • https://bekarofadu.weebly.com/uploads/1/3/4/3/134346179/bimutavusu_pifavoxesowa_fiwusapizurej_waxuj.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/winepogor.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/sifuwatodomenad.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/venunamazozuzo/15803115236.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/53872900420.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.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_off00006d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 5380 bytes
SHA-256: 9d82a80479d5e9ebbba074f36a45f1140f88bd1a7a328549f9e4c54fb2c48996
font_01_sfnt_off00007fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE9 10296 bytes
SHA-256: 7bb1de8f160bb4f1d117da670fc44771cfe9fecf737432d56c3ba45fb0050f34