Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc64fda01cb6004…

MALICIOUS

PDF

64.7 KB Created: 2020-11-12 21:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 069e676be39e4cb0a497cbf8dbdd7167 SHA-1: 51c3dedd8c3ff2bd17e57380512db343b9f6f79f SHA-256: 9dc64fda01cb60048590aab97364d6f3d0b338aef9d834ae8724f6abe512f552
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=alien+shooter+3d+game++for+android In PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/jefefowelo_nazepasisedina_refuzixipuzijok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8704e7c7645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_5faae692e7253.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/jinatufisile_wimunedujeni_weviboga.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/8680ff79-ca85-448e-8573-3d5dd8252f14/2856829777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7680735e-0a34-419b-a8f2-deae6d091760/Dessins_anims_rotiques_japonais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d4b702-51af-47a7-b764-77aff5d69a94/54028604525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7870f65-052b-457f-9515-08c94e0c364f/69190143391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf57ea7-5cbd-4abb-8deb-bb228307b018/winter_of_the_world_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291341a0-5909-47ea-b71a-f243a53dcc34/formal_and_informal_letter_writing_examples_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f09e48-5a5c-4178-9347-eacfc064d03e/88677662682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e930c7a-125e-4483-8734-469131951956/zitogilurolugizu.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_off0000c0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EC 5476 bytes
SHA-256: 9f1871fe5f82a386f9dd8740517843db2014b702a5b5f913deeac69c7b30e010
font_01_sfnt_off0000d35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35B 10204 bytes
SHA-256: 9e9959f196390e7b6caa0c72a9cc5652f8203ff9a8b299e311fe08d57b1c07a9

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