Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f5820a5870eb9b…

MALICIOUS

PDF

61.5 KB Created: 2020-10-24 15:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: d41ae194e68a33998ced76b84a146b5d SHA-1: b16cd2a398212519ae789b517d8b57f34e07c1e4 SHA-256: 63f5820a5870eb9b3851dc3f1bb45af7839af423d0c8e13b410f22bea80c8cf1
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://gettraff.ru/aws?keyword=tratamiento+psicologico+para+el+alzheimer+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f8cfd1a885d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f8abb17c627e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f922e5967e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f8c97d047f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f93073b443f9.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/3aea4de5-d156-4eba-8bcb-f07da860eab7/dusigotunupib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18122406-acc3-43ff-b2fb-a3ebc29ec039/83711559326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5692db0e-2da1-4c34-ba4a-152f7d728553/92000234762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e838b945-8f3f-44b8-8d85-9e692a7afe71/tebujixubalituliduzosana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beece6f0-7aad-4e16-8c6b-1d3f5cb2922f/xujotuzod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b57d3c8c-534a-4ea7-9d89-48558a7bdc9b/wewokebazekuwunexekibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857c6423-8ef9-4f91-a0e3-b03116019d4b/67361885676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd92c7ca-8dd4-4f24-8433-ae5c30ec38fa/xanituxuwipifipepijupekav.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/anestesia_epidural_cesarea.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/fundamentals_of_accounting_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/ansi_ashrae_standard_15_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/rusuvunelodufudujejizap.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/30656586798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9675b765-65dc-4a01-8fb9-ae9cf10ca3bf/the_secret_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b38ba3c-5fb7-4af8-9cd1-f6997a01d643/14124680429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/050b9ffb-d5e8-4af7-801a-d2168172ef57/fikagaxogoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0706200-a690-4d06-91a3-38f9a011bcb3/22330216682.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_off0000a285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA285 5356 bytes
SHA-256: fadc5104667d25812714d5c18ead7c09fdb7c34de04120197e668cd4b2e68a0a
font_01_sfnt_off0000b488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB488 11040 bytes
SHA-256: c9ca3a6a458105cbef5b21498e1b5258cf3f98b01a18f046b8ffadb0b57bb574
font_02_sfnt_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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