Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ad3a8389a1b57a…

MALICIOUS

PDF

45.5 KB Created: 2020-10-16 02:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2688906f35d432ca0c5e772f65de0458 SHA-1: 51bb9e2fbc216010685c3aa680e9c0e58a652d2a SHA-256: f8ad3a8389a1b57a09a9c928d815eab773ae5bbef4a41bd6300fde033b4334b3
124 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=addictive+apps+for+android In PDF document text
    • https://site-1042887.mozfiles.com/files/1042887/falikuzelosuzu.pdfIn PDF document text
    • https://site-1042968.mozfiles.com/files/1042968/33202172330.pdfIn PDF document text
    • https://site-1038670.mozfiles.com/files/1038670/rokisovajonajox.pdfIn PDF document text
    • https://site-1040775.mozfiles.com/files/1040775/60741608762.pdfIn PDF document text
    • https://site-1037251.mozfiles.com/files/1037251/26333361725.pdfIn PDF document text
    • https://site-1043485.mozfiles.com/files/1043485/67347670321.pdfIn PDF document text
    • https://site-1040764.mozfiles.com/files/1040764/96513079343.pdfIn PDF document text
    • https://site-1040238.mozfiles.com/files/1040238/47682200853.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ef82e0d.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/lipabewazaboz.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/sevabenabuno-vugexajazubi-xofusasuvonulim-barogugasewokat.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/wozumadaku-mukevewurovebu-nefebo.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/1a3daaf8-fd81-45cb-9d80-fdf59c9f2157/zopujusijusovidepawap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052d9568-d72a-4473-928f-2e9bf36ac3ec/54799819659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e710c6-e2af-4e7a-8656-f8a28018be6d/89590439629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/mofirasutut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0039/2603/files/spanish_pronunciation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7829/9031/files/cracked_iphone_5_screen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4372/0868/files/born_on_the_fourth_of_july_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8424be-de11-40d7-8112-aa0db3a537d5/melajulideto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3a1284-77a0-4e30-91bb-e22d41d20044/pidobimemuwini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33610df5-b16d-47aa-ab27-61b6b66b4039/vanemaritowa.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_off0000674b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674B 4956 bytes
SHA-256: 0bd369ed039dd504f4ffd137031561331eb7716d8d3209346072145d3374a483
font_01_sfnt_off0000782c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782C 9960 bytes
SHA-256: 8475da6f14eca8a710a0743f3501dee483c71e49e832f69d200d54ef15afca94
font_02_sfnt_off00009a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A28 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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