Malicious PDF — malware analysis report

Static analysis result for SHA-256 40192ef70be5cddc…

MALICIOUS

PDF

46.3 KB Created: 2020-11-03 23:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 65bc1e22ffa730153f779068264ad1d4 SHA-1: 06de96653641f0bbb7b4f7348efd03f8b74bae17 SHA-256: 40192ef70be5cddcaab831c97f8db2790a0321d8f8383fbbe5505e60d4a1767a
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=words+for+cleaner In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f94d0fba8216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f86f4da2ac8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_5f9ad87e77edb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5f9757680f109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f870bec297ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f9189ede6f6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/retobifulipo/hp_z230_technical_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6107820c-0bec-447a-9567-263deb23fcf8/dq11_party_members.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/nabiwinugigizukuvuxole.pdfIn PDF document text
    • https://s3.amazonaws.com/mogelebolep/tuwokexebiwimobinuposesa.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/centurylink_email_login_webmail.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_off000069c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 4688 bytes
SHA-256: 899cafe350dde49855fe43f1fd5a45ddcdfca82f77d66834871bcb67f80674ed
font_01_sfnt_off000079c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C4 10836 bytes
SHA-256: e77852b5ddf1fd040db965f2937098a325adb34464b29baf52ead6f2b60fbf17
font_02_sfnt_off00009e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E26 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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