Malicious PDF — malware analysis report

Static analysis result for SHA-256 b502430651912689…

MALICIOUS

PDF

46.7 KB Created: 2020-10-02 18:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 737242559ce38f33732bacd4010d559c SHA-1: eba1a25f12984adde47033e1dfdb4932bd118cbc SHA-256: b5024306519126895fae58f50f86d06aa0d9918c8146486730c741604d0990e9
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=lucky+luke+english+pdf In PDF document text
    • https://site-1040179.mozfiles.com/files/1040179/zisutaxujugunurefokuz.pdfIn PDF document text
    • https://site-1038811.mozfiles.com/files/1038811/3832791803.pdfIn PDF document text
    • http://files.zevkali.com/uploads/1/3/1/4/131454355/eb8fb6dd15b0b6.pdfIn PDF document text
    • http://files.funginator.us/uploads/1/3/0/8/130814516/naxalukususo-ninufiworetuzaw.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/04e25425-0b64-4dd3-a20b-aa77e009bf80/6994081004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3dd91a4-a463-440e-860e-251ca4b23c0d/fazifazuzenenowukaxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568f4e83-e0b3-4a9a-85e9-dc900e8d364d/78866131198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efbdf1c6-389c-4aea-9efb-c23e03c500a3/nipukifupejorakijux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a112c9ee-5424-45b9-92e1-fc9591a5946b/4918641689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6385225-a753-4fdd-a011-2345ad1d19f1/67118378408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597b4cd7-4055-4b71-8d0c-423d2a141c9e/dojixajuvonopegivozalotub.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_off00007992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 5220 bytes
SHA-256: ed6a0158caeacc03609755ce002a671af1c249a931c56c2a42eb7bc8d16144f6
font_01_sfnt_off00008b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6E 10100 bytes
SHA-256: 766ff175bb0386c3ef791507e3dd58bfa8ecca9be94300771e6e8b171af21940