Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12f8c8601bb239b…

MALICIOUS

PDF

41.3 KB Created: 2020-10-07 20:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bdc01c661385d4a7c02e4265e9ab5158 SHA-1: 7b888dee8662763bfd00e4d7ce637cf58746a0b4 SHA-256: e12f8c8601bb239bb27300c16437dc72a05cc80728eae95218717fa855fd0a2c
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://ggtraff.ru/strik?keyword=geographic+center+of+united+states In PDF document text
    • http://vitevam.likesofliss.com/uploads/1/3/1/4/131453598/3109668.pdfIn PDF document text
    • http://files.ronsokolbooks.com/uploads/1/3/0/7/130739996/tixomeza-rumijulonabu-bumabepado-xuberasugazeb.pdfIn PDF document text
    • http://files.speakenglishquickly.com/uploads/1/3/1/6/131606429/20ecd66d.pdfIn PDF document text
    • http://sexax.andigeloolaw.com/uploads/1/3/1/6/131636644/ponobizasivifepaf.pdfIn PDF document text
    • http://files.walsh4one.com/uploads/1/3/1/6/131636736/leviradideni_vareg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1961/1555/files/zunuxokijanafagibino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/large_digital_wall_clock_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4579/5493/files/63285757404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ca7fa6-f9b9-4a16-bea3-5820a60f250b/8747120379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76b9179-45a0-4740-ac69-0849304d40e4/88727068510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93363722-3d6b-4b0a-97e8-8ef4a4b7e554/2001291366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284f2020-fe41-4ea3-b3cf-439c9d92342e/migibojifababud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6465404-1bbd-49ae-84f5-b895ba1475e6/xasedirokamelijame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d23118d-767b-46fd-9e8f-ed22ae3d0e9f/34244938585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f83b97-ecf5-41b9-b887-f1b8aa26abd4/xemuma.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_off000062f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F0 5416 bytes
SHA-256: 0120f019c19146a5d1810498230da5e58e2d6fea0e2e1aca5bbb62ad73a89ca1
font_01_sfnt_off00007559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7559 10340 bytes
SHA-256: 52645014eebf8dd9e2c1a45ef781537396bfe962a6b9a9fe6125a1a1bffbd39f

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