Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ba41b172049951…

MALICIOUS

PDF

34.9 KB Created: 2020-11-08 20:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d58f78349b6c2105ea95167932defaba SHA-1: eec22e173a18bda2ff942fccdb06e6c33e1d6063 SHA-256: d9ba41b172049951b0c322002846322d8cd089960e15394b0e57cb0909f5494d
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://traffking.ru/aws?keyword=nagle+college+facebook In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_5f9a11c182c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f875bb244514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5fa25835d48ee.pdfIn PDF document text
    • http://www.nagle.vic.edu.au/MehrIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/futumawitujerug.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/foot_washing_baptist.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/important_current_affairs_march_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/pajalivarub.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/mmx_value_list_roblox.pdfIn PDF document text
    • https://jipowexive.files.wordpress.com/2020/11/android_auto_clicker_apk_no_root.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/hawaiian_beef_stew_recipe_slow_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/kozuwir.pdfIn PDF document text
    • https://nuzaganadu.files.wordpress.com/2020/11/zikoteguvukikiki.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_off00003fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FB0 4948 bytes
SHA-256: 6a8d51c944d4c4ffe5c25ebec32b1ee5132221c81df402fee0c6643149266541
font_01_sfnt_off000050aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50AA 4808 bytes
SHA-256: 90b8ed9d399fb8f59db553d8154d51081641c941966dcc38a13896954cb4d6fe
font_02_sfnt_off0000623c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 8464 bytes
SHA-256: c3511648332ef182697b78ad665effd2121138260a11f422ff37ea2a699e8b19