Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdb2acfd139e3a7…

MALICIOUS

PDF

44.9 KB Created: 2020-11-09 07:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: dd1b559013c697c38a10cb444bb9b084 SHA-1: a2a9b7607db74e0ee94f64e8ae5732573a7cb296 SHA-256: 0cdb2acfd139e3a79ec6175a1603b07d7d28f9aaa906e3a559d5c1f0f6bf914d
194 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.
  • 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.
  • 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://traffking.ru/123?keyword=unconstitutional+laws+void In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_5fa64cbcb3cf7.pdfIn PDF document text
    • https://kipuxemoxux.weebly.com/uploads/1/3/4/6/134616309/7617071.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/jumivarigumopabexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f8e9829880ef.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://monirasuwa.files.wordpress.com/2020/11/71958226928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4166b211-16cb-464b-8dde-be29f630b9a3/22190082563.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/western_valley_conference_baseball.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/philippine_retirement_authority_id.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/2374038195.pdfIn PDF document text
    • https://wijufedu.files.wordpress.com/2020/11/13593741998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caca08d4-836b-41c2-8a73-9f09e1b36aad/6314835579.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/gezikumetujexamel.pdfIn PDF document text
    • https://jutokegimaz.files.wordpress.com/2020/11/free_printable_frozen_coloring_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/15486035404.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_off000062ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 4744 bytes
SHA-256: 640a58306d53ccd59aaaf68c27b4c398fb991bafbefd78b1ca7dfb71d086a8dc
font_01_sfnt_off00007300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7300 11496 bytes
SHA-256: e97a33ec591219cf6dcb88471516a1685accf8aa9f0b028a1cc8eb123ad0cdec
font_02_sfnt_off00009901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9901 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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