Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30151569a1a72dd…

MALICIOUS

PDF

41.0 KB Created: 2020-11-06 00:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 0af856ffd27a98c26887e0fe4fe87981 SHA-1: 0d51b5dde600c4c8e79e98230ac032d0cdbb5ba4 SHA-256: c30151569a1a72ddba23f3bc4ac89918ad81289532f4a04368d920bae4fee850
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://traffking.ru/123?keyword=constellation+worksheets+5th+grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409236/normal_5f9386fc250d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f8dc2cbc5dcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5f961101da1ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_5fa23bf5a1deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f9fb8c0e8988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f881be1c6c0a.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/5be1fffb-da86-416a-bf3e-84d7c46108b5/vefemumulefunosuwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630ad673-9be7-4df4-8bf0-9cc3a8f97485/rulizaxizatafibek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4280771-f247-4aec-a06a-1364e8c29100/bobitezikadobizitekiralod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/704b5799-ea3e-483b-b971-94727695aabb/84623471705.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/ginib.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 5272 bytes
SHA-256: ebd546ca63cf3ea3b0b7630250221112b422d6efbfd29621627cb09a265a98cc
font_01_sfnt_off00007387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 10460 bytes
SHA-256: 2ab89bd9a8fa4b94405116b881f7dd7443d4f04ccf649390e0dc1de8562051bd