Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6885ac000402c22…

MALICIOUS

PDF

46.5 KB Created: 2020-10-15 14:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 29c8826912e63353320be2069865b39a SHA-1: a40f93a33e443c5091ffd9deb0302b1a7c1b45b3 SHA-256: b6885ac000402c22dc05f75a81bf9e7df6187958ddf5857d38233decf1727b2f
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=download+canva+pro+apk+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8820f851f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f87a92de31af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8733169b53c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f881a8e2b823.pdfIn PDF document text
    • https://site-1039957.mozfiles.com/files/1039957/37780125199.pdfIn PDF document text
    • https://site-1038777.mozfiles.com/files/1038777/12621178712.pdfIn PDF document text
    • https://site-1039772.mozfiles.com/files/1039772/72329829757.pdfIn PDF document text
    • https://site-1043117.mozfiles.com/files/1043117/kuzafivamif.pdfIn PDF document text
    • https://site-1040869.mozfiles.com/files/1040869/tenubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f87eb89af7b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f8757299703e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f873a016b524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f87e83c09b42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f882702881cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8735dc152b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f877f291f34b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f877eef3fda3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8779f483022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f87214ba7c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f87122a5052e.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/02ca1065-b307-471e-a692-819c01a21ace/dafotuwetigom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1827ca55-8484-48e4-82b0-7be9b054e9d0/62159883073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4315471d-f2a7-4464-b506-3dfd99f7f2c5/kesulin.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_off0000688c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688C 5188 bytes
SHA-256: 7941a79f03a972c6ca208a0096309fbe0cde0a2fabb19991d910da139ea23975
font_01_sfnt_off00007a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 2736 bytes
SHA-256: 78671467ee272725b94201c6a13264da5880864e58919bd876cb69fbcf774e6d
font_02_sfnt_off00008611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 10636 bytes
SHA-256: 376f045503ba3caca1698aa7c9b8c16f1b36f2f248ab6cd90cec65022e61c51f

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