Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bed3b856d18cc96…

MALICIOUS

PDF

48.0 KB Created: 2020-10-27 12:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: c9b45677f139d76e5379f304eee0cdc0 SHA-1: c4aa8b7b59bcb8c102e79b62855bc7b3e6a1f69d SHA-256: 7bed3b856d18cc9689b1ec5e0b9a834a167d166b9fe3c06daf64350e4336d089
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://ttraff.me/123?keyword=what+did+the+progressive+presidents+do In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f8d8e5199b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f873f4285f43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_5f9491a540479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f882b8251c24.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/tetazino/78136521522.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/44318091223.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/nupav.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/lufelaped.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/pagurafiv.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/godogazodaroketesur.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/wosojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea524762-e8c1-4978-8786-9d200afb4dc6/jurassic_park_3_in_hindi_download_fi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a01916a-26af-46f8-8867-919d36767189/gobujuserag.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/dazipuzilovonapeduja.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/47391076400.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/cause_and_effect_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/57476319108.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/28877555735.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/sat_subject_bubble_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/cissp_practice_exams_download.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_off00006568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 5264 bytes
SHA-256: 44638a112709d34d03faa61f236872452cca75288e0d510c256489ab04a1fadd
font_01_sfnt_off00007758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 10956 bytes
SHA-256: 82241b92e2d83838bd6dd6973513b5289991e2638fa6db7c598d9e5f0147909f
font_02_sfnt_off00009ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCC 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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