Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa5993490166ff0…

MALICIOUS

PDF

42.4 KB Created: 2020-11-06 13:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 6273631a0d19e3aeb08a9f078a747d25 SHA-1: e62b95f2b90d80401aec72a709caf9223e92fd83 SHA-256: faa5993490166ff0c0afb7bd56acf8182195167849674b00a7fbc62e536e96bf
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://trafffi.ru/aws?keyword=american+board+of+cardiovascular+perfusionist PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425501/normal_5fa253822471e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461748/normal_5fa1a6146acae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f880d662245b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_5fa14b460f4e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f886af569507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f985fb965131.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/vutame/exception_hierarchy_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/segonakomigixanavufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8c123c-749a-4946-8b4c-b81ffd3d9b5e/rosunetugekemod.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/lubil.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/star_stacking_software_review.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/galifi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/59068779256.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/book_serial_killer_series_in_houston.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_off0000668f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668F 5488 bytes
SHA-256: 75b14ec808fbd29821beb140b0472bfc9f2caf0073c5a17048b19d7caab30237
font_01_sfnt_off00007924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7924 10328 bytes
SHA-256: df44028f0613932f3bfabd9ca1854af540ac37854f7dd6b775eac3ace645e603