Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da49429d35f9dae…

MALICIOUS

PDF

39.8 KB Created: 2020-10-15 08:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e5827ea32ffe7fe1ddbca339c63349a9 SHA-1: 6b2bf9748a01e6a9c34a6b524c2539832d542f65 SHA-256: 5da49429d35f9dae6fe25fac90735551310f3a16d4717d88939fd258c725923a
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://cctraff.ru/strik?keyword=tethering+and+hotspot+apk In PDF document text
    • https://site-1039505.mozfiles.com/files/1039505/beganudisinesobimon.pdfIn PDF document text
    • https://site-1042498.mozfiles.com/files/1042498/easy_maze_worksheet_for_kindergarten.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/koxomiratamipekobunesora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8729b9d6831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f873b3082c32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f877ab7eea6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f870a180201d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f87b1770fe54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f87aec38beae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f878f63d3209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f87814fd417a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f8c2a70af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f87080781918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f8797c89753b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f874e93caa8a.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/c7b3b080-aa5b-442c-bd84-ca6e7f166331/tasarexepowawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f4360e-ab06-4c50-80fa-535da3c5b74c/12864638769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bce109b-6497-4187-8ae2-aee96c686091/vekuxutowidifasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e09b7778-f237-4a29-86f0-0b76267785a9/zozowevuzunilogu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6C 5204 bytes
SHA-256: d093af8633e71b15df542f0dc1e827d6f2a2c6d100dfe98537bf4c9607eb69a8
font_01_sfnt_off00005e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 8948 bytes
SHA-256: 99b684b14b2259408c2ed0377e58030aa052a26fb98ecf22dd9f40836182d00c
font_02_sfnt_off00007cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDF 16144 bytes
SHA-256: c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b

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