Malicious PDF — malware analysis report

Static analysis result for SHA-256 3621b7133fa06d16…

MALICIOUS

PDF

47.4 KB Created: 2020-10-30 23:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 7e856931003eabc221e7f1c9530846e9 SHA-1: 7e440c15527f7da5105d3b7c37486f1932382499 SHA-256: 3621b7133fa06d16fb824064028d2bb8523f046e7a8dc77adc03a27c1be7db90
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://cctraff.ru/aws?keyword=cartomancy+card+meanings+combinations+pdf In PDF document text
    • https://nedudefo.weebly.com/uploads/1/3/4/3/134389218/rulokun-tipajadodi-folaginabira.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/12830257977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6caa25f0-c7be-4df6-a4ea-680e9a30d656/69372303679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662850ba-769b-46db-b1a7-97feebb30afa/zuzowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d483f98-8d1f-41f6-a3db-d9696fbaf83f/plant_physiology_and_development_6th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a03fc8db-0f33-4d76-8a2f-07f2025ebd00/dabumorogudit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1da0f6-a65c-4e10-b3b3-57b46fcbad7b/pedubulikasoweso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2499e8fc-0aff-4a7d-b03d-2d35151675c2/nagajotomiwod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa11b026-adbf-4357-8000-41c77c922344/gillette_fusion_manual_blades_x_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3545f654-b422-4427-93b4-20e6f06a6018/proyectos_de_mecatronica_sencillos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87f36e1-a851-46cc-8c2f-16953ba53e35/11402539956.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/speed_velocity_and_acceleration_problems_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab182520-5b5b-4789-9c67-62cbc32ffc13/integrated_mathematics_2_volume_2_an.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a016d3-89e0-4bf2-b93c-c3e57be6f481/13085223850.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/screen_door_portland_black_owned.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_off00007926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7926 5592 bytes
SHA-256: 5db93740259d025ea9d4d5fa574df8cb6ae632d960318881fd188cfdc08196ec
font_01_sfnt_off00008c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C17 10772 bytes
SHA-256: 106ce6536dabcbf1fb886d6ae1cb4f654477b2b37b3a4fc953bceb0eaa0a474d

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