Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bad1abeed1a4b29…

MALICIOUS

PDF

60.0 KB Created: 2020-10-08 17:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: de508d0b8ea89602a6af72afce9ce26f SHA-1: f01f8b21305e6d01248927fa763d36a9d601222e SHA-256: 3bad1abeed1a4b29a555bdf8f8605db979e737e1ea8865d5dbcb3923bd9d67af
142 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=free+judiciary+notes+pdf+in+hindi In PDF document text
    • https://site-1040129.mozfiles.com/files/1040129/29333295376.pdfIn PDF document text
    • http://files.abingtonpolishing.com/uploads/1/3/0/8/130815115/tipowefejopuxaz.pdfIn PDF document text
    • http://files.onethirtyeight.org/uploads/1/3/1/0/131071137/7fa48e99d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9a05c0-36f3-4b8c-ae65-700791b5c53b/90159577016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70fec276-3c03-4ba2-90a5-e15a4ff3400a/67718747094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e6efca-2a27-44de-a6ce-52bf23540e96/sirifijuvatade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9c767a-5051-481b-a806-d88ded7f911d/36346900588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6599/4147/files/bolobinotuzesuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5077/3909/files/cooking_club_of_america_gadgets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6824/4135/files/88629338032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3091/2934/files/equifax_mission_statement.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7469 5344 bytes
SHA-256: dca16de66e79d19268bb805fe8d0f9aff9738d41c9b5b3310cef34d63d5859ac
font_01_sfnt_off000086a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A3 16108 bytes
SHA-256: 6e0b0ecc0e8f2e783ee663fd7287c29fe3b6b3ed9820d48a92b42e7e06027138
font_02_sfnt_off0000b7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D0 16564 bytes
SHA-256: 24c41dec3f4a398f8a4f1609726fc352eda689a8cec32d19dc3fe63083d21312
font_03_sfnt_off0000ce21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE21 5780 bytes
SHA-256: 8cbebdbb5b6761c96ea37ebb380d870c128122560bc934509b0d8b5f3fad0a5d