Malicious PDF — malware analysis report

Static analysis result for SHA-256 64047371989e2cea…

MALICIOUS

PDF

70.8 KB Created: 2020-11-18 05:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f10338ee99c48104284da2e48c3de68d SHA-1: 30b6003d7aff06e6f71024e989778a9573434aea SHA-256: 64047371989e2cea851283a670c58beff5cee32e11349199d47500b5ce5170bf
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=skeletal+system+diagram+blank PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421350/normal_5fad12c8ae19d.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/1e35e.pdfIn PDF document text
    • https://komanibinepo.weebly.com/uploads/1/3/4/5/134588578/jejigipet.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/6596298.pdfIn PDF document text
    • https://luwinititik.weebly.com/uploads/1/3/4/5/134587042/9161475.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://s3.amazonaws.com/fapaga/jekafufofegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e08183-443d-4c67-9e27-259efa64af7c/3.5_applied_statistics_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4440a8ac-2ccc-49d0-afd5-b65436de47f2/pinkel_salary_missouri.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/dietetico_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61dcfc21-8fab-4272-a3e7-e4c35231776a/tawileru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f54aed3-7928-48b2-949e-8ad01f55221e/multiculturalismo_diferenas_culturais_e_prticas_pedaggicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e3a09c-28b5-4808-b1a1-b1b08b4e2dd9/discovering_french_nouveau_blanc_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022cc2b7-56c8-459c-88e8-3dd8d2967523/neighbors_helping_neighbors_mount_horeb.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_off0000cacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACB 5232 bytes
SHA-256: 6c4675e06bde497c7d0b1541a0adfbf9ad9590aaef9efe1cde0d4ab0f7f9ca2a
font_01_sfnt_off0000dc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC73 10828 bytes
SHA-256: dd6dbfb226a4cc16ca450ffcc170fb8451951c138b3639afed5063be754d3706
font_02_sfnt_off00010050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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