Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e171e38fdf9c054…

MALICIOUS

PDF

69.4 KB Created: 2020-11-08 19:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8d221d9a5eaa42d8c4c4b78c4e2aa0e9 SHA-1: 6abf63f4c7e1d63a23267e655250911bd94117f1 SHA-256: 5e171e38fdf9c054ca61ee98c322c130c88f849e91bb84edc8f61876a7ae87da
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://traffmen.ru/aws?keyword=my+hero+academia+episode+63 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_5f9f9bbec98f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f9fcd335d62c.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/temujonuwu/kazenexamulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c74a60b-bb26-4101-99f9-eb0f52f5ab18/rawasavufejebelisizapun.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/solving_equations_with_fractions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/head_to_head_football_2014_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a5a578-7f65-4f4a-b998-bc9e0d266daf/suxoxuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0e1658-1b1c-4fbb-ad24-432a5b9d1517/69932942509.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/sewidajabuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/skyrim_blood_on_the_ice_stuck_examine_crime_scene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a9259c-1b9d-4207-81d2-4acab20a3aae/guwizaxetonagusuruwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/21330492928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f529e6-4430-48eb-bb1e-efcb0f4065c1/54961232581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b79e8af-1e39-49c8-9c9a-79412386ac6b/78461412807.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F5 7548 bytes
SHA-256: 0ff0d7662fa3bbd570a3466be2b5790e5ca1f0276868f00586cb7fbc55407c8c
font_01_sfnt_off0000cda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA4 5704 bytes
SHA-256: 52c3947aacdf00b3d7003e20604dbdf6eca50c8937feecc521c3d69c1a3b9812
font_02_sfnt_off0000e0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F2 12048 bytes
SHA-256: 5a75e532a37fd6e1d30982a3d205305d67e97e3b0a1053c81ca1b39c936a7d9d

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