Malicious PDF — malware analysis report

Static analysis result for SHA-256 451dc62bb7238a5d…

MALICIOUS

PDF

40.6 KB Created: 2020-10-01 22:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7be5d0dba8e58cafb5a3d0bcd2b5ec91 SHA-1: 5addc83f7022958176e4b18e9d7eac05d9b66a77 SHA-256: 451dc62bb7238a5df68fb3d4e800c835694c99f8354db89a04bdb3f61008a434
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/strik?keyword=back+to+ubersreik+weapons In PDF document text
    • http://files.bennetcaraher.com/uploads/1/3/0/7/130739016/2790801.pdfIn PDF document text
    • http://zokuva.mrallansciencegfc.com/uploads/1/3/1/4/131453870/xilimedezixaven.pdfIn PDF document text
    • http://files.carolinachildrenstheatre.com/uploads/1/3/0/8/130873921/busekub-jesutuloka-tubis-sijejiz.pdfIn PDF document text
    • http://files.angrypenguinapps.com/uploads/1/3/0/8/130874148/zakonunisijofa_vutejosusobi_xewutugokijegag_tumuzuxixoget.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/1d568bd9-83d2-4334-9264-c62ee6c0bbb4/regetuguxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3faf545-3190-4cd6-bd36-056e98f67f4e/lukeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2873da-2040-4cf2-b78b-e74c8f3ab6e5/karoziboxelufida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710aba3e-8e36-497a-87bb-6de567ec3944/45170840036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d5cced-8a33-45c7-9e0b-b6420f45c366/gupenatuveruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851986bb-e0ec-4567-92c5-05bf0be9019f/50972577105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec48c571-5869-4d5a-b786-d265a33c6962/34633023375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5d27b4-9e36-49e5-9a73-933eb54c0145/kirovipepig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eab857c-8a15-4600-ba16-eba9e52cd293/54386756487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/15957538587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/relavovinaras.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 5240 bytes
SHA-256: c3ebff6cda696e0cdb3b074bad2a60f16e7906d81a573955de7972909d123729
font_01_sfnt_off000072af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AF 10360 bytes
SHA-256: e1cc3baf7825417192d94176605ab2f1662d57440335c3351acb7216034f6b68

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