Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce90def92a8d1965…

MALICIOUS

PDF

66.4 KB Created: 2020-11-08 04:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 3147c27a80351101df02511b93d32802 SHA-1: 76306c38bba3ef1dc5711d513bcc5e8f8763e258 SHA-256: ce90def92a8d1965147cc5c22f5533d05e784aacda49e0849d84e37b6de8c8a0
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=the+hunger+games+choose+your+own+adventure In PDF document text
    • https://fegilekupajot.weebly.com/uploads/1/3/4/4/134404616/6410452.pdfIn PDF document text
    • https://vezexozozufizus.weebly.com/uploads/1/3/4/3/134372857/2594076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5f99013b56810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5fa672daa7eb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8ccf6e56db9.pdfIn PDF document text
    • https://zomasaxejis.weebly.com/uploads/1/3/4/3/134325580/9b7c11ac21d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_5fa3deaa276bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5f91efcc62957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_5fa74cb6e82d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5f96e23ac62dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5fa31b65276e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5fa23adceb8da.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://uploads.strikinglycdn.com/files/805f059b-011a-4c2b-8131-f2e8215eafd4/62163648052.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/gap_mission_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/67948969214.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_off0000b3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A2 5356 bytes
SHA-256: 30e5ef425b624a634296fbd88db29c90d94272dc65ccfb0ba86e89dd993d073f
font_01_sfnt_off0000c5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BC 12388 bytes
SHA-256: 763dab34437b11b42098db83aa7b5c9ad729c79a1ba1cc005d2adc5bd6031103
font_02_sfnt_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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