Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b34ca1737a01444…

MALICIOUS

PDF

38.2 KB Created: 2020-11-09 13:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 4b7c07540ccbd278f0594c854f8e41a4 SHA-1: 86e7e0aa390c3a89869735752eef272c6e991378 SHA-256: 5b34ca1737a014449d4fb1bd0ffcd982b3c24f2364eb3b37bc7bcd2ff0af9ee7
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/aws?keyword=2019+zx6r+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f91d642b8532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5f91581d2348e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_5fa7df4bee186.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/4ef34dac-d575-4ae0-96cd-f4c8c8c6776f/sirimiteb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6de645-6928-4e26-9e96-419efb00a2ce/51125163913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/969ef11b-1bcc-4584-ab82-a2ec78fe8e57/2746141699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4d9343-53c9-4cf5-9ab7-a2a434e90ce7/4-h_logo_clip_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553cab0c-5f60-400d-9de7-9ad94dcbd05d/jomufugu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/copaiba_capsules_doterra.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/exo_members_in_kdrama.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_off00004a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A49 4836 bytes
SHA-256: 8ed67d4bd57c13a525655fc1e7ab8cf1f51b950318b710603200807e2359629c
font_01_sfnt_off00005a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8B 10612 bytes
SHA-256: fa502ffd6366393608a3c98520120e7b23222aa70f04d4de0b94125064234090
font_02_sfnt_off00007eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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