Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe9430740019d05…

MALICIOUS

PDF

66.4 KB Created: 2021-03-08 00:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bcd42e5ee4bf462fd6fd30298a7cc086 SHA-1: ff24686bbf1241f7846554f54bd2c5b57d16e151 SHA-256: 7fe9430740019d051b98fc3c55be70e22d5a72d89a3824334f79208c7ad4a755
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=progressive+era+test+review+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fcdd9eaab171.pdfIn PDF document text
    • http://instapriz24.online/stickers_for_cars_and_truckskndl0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5fe36d86ea5ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467036/normal_602c4ed9eaece.pdfIn PDF document text
    • http://amst-watch-v1.club/why_is_my_samsung_galaxy_tab_a_charging_so_slowurw4h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424662/normal_5ffed049ceb9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5fcbbb48a3028.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_c5ade6d1da0b4a46b547409754b065c1.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_c28a668740494f7e9d50de8b6c1ade99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/19585242054.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/master_electrician_test_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/44071317648.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/beoutq_apk_live.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/wondershare_video_editor_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/el_sistema_renina_angiotensina_aldosterona.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/xebugekabilorufibolukaj.pdfIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_ad6670917ee44c4593ecf3ac2a927e13.pdf?index=trueIn 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_off0000ca8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8F 4976 bytes
SHA-256: 1a342bf6afa1fd17c925919bb67b2f58394c5abbd2ca925b58383545436ef9db
font_01_sfnt_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 9676 bytes
SHA-256: eb5d4f8821f54f8bf671090a87249074b0433fd8ce3829bfa888dc8991389ef3

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