Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f42a137cf47e8f…

MALICIOUS

PDF

68.5 KB Created: 2020-12-20 11:09:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a43c6b2a4fb9a3f58826bdb8613af22e SHA-1: 37546f5698cd5c0eb278ca2443f2944c967c06d8 SHA-256: f9f42a137cf47e8f3eddfa05a3214d33c812918032be8755f203550b2104d51c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/square?utm_term=the+cask+of+amontillado+pdf+short+story PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f88cee18c1d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fc62d59da3c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448727/normal_5fae2e5789d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_5fa2d27eb6a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5fba6c32a314f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5fafdb6d0e231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_5f9b830aeac00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_5fb5ec030fcdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493227/normal_5fce64a1110c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_5fd3448cb3477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456387/normal_5faaaf3e0fdea.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/d25cefbb-db9f-47ac-91c9-4ce4fcdd51d4/togasira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6277019-76a6-4ee8-9119-19af33e830e9/google_chrome_delete_browsing_history_on_exit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ae857d0c8f249d464d7c/t/5fcc3266fe657040d583623f/1607217766840/bee_bot_robot_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e1ddb2-7056-4ed2-9d3d-e982d41eb90b/30061341881.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_off0000d08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08A 5512 bytes
SHA-256: 83fc34961689bab788d1829049396d3680822618638464680e8ac54f513ce5bf
font_01_sfnt_off0000e32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 9932 bytes
SHA-256: 7fb80b6ff665fa69773b1cfbfa03ac3f9b3f4c2047dde963da88f480ed5c8e8f