Malicious PDF — malware analysis report

Static analysis result for SHA-256 9321f43dbf5d0473…

MALICIOUS

PDF

48.2 KB Created: 2020-10-05 14:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2fe81eb8a7eaadecc6447d6b4b219630 SHA-1: 7e5cf619635d344c0706111240a5598d8d19a6bd SHA-256: 9321f43dbf5d0473bbef1b6720aa1ca3662fdcc80623352b25b088337a41364f
184 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.
  • 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://gettraff.ru/strik?keyword=hardy+weinberg+problem+set+mice+answer+key In PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/66194345886.pdfIn PDF document text
    • https://site-1041613.mozfiles.com/files/1041613/xuvaxubasuteviferu.pdfIn PDF document text
    • https://site-1040601.mozfiles.com/files/1040601/32312038067.pdfIn PDF document text
    • https://site-1042193.mozfiles.com/files/1042193/menuse.pdfIn PDF document text
    • https://site-1038700.mozfiles.com/files/1038700/nibovavavurosazurok.pdfIn PDF document text
    • http://vutiga.diversitypractitioners.org/uploads/1/3/0/7/130739206/8887768.pdfIn PDF document text
    • http://luxeguf.dinkc.com/uploads/1/3/1/8/131871781/9828bf4648.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/5f241026-7c61-4fb0-babe-37533e4b3b9e/4774069215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ccc5dfd-e456-4b09-b594-973edec312c2/miwuladukonojisil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a473a356-64c0-4d89-8b42-8a92565640a0/2437858686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9dff3ca-2c3c-48ba-b8e9-ef847cee234e/somuxebegedunixuvimob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6138/6147/files/31528252924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/hauppauge_wintv_v7_serial_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/gebiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3993/4622/files/2982593572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9895/9769/files/mufedofitajagozon.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_off00007003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7003 5540 bytes
SHA-256: 17174dc72d5e7a8537de450b0fb05aa47d38830f8b2fa3447c94d887b6ef3ae4
font_01_sfnt_off000082cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CB 10192 bytes
SHA-256: 53870ea09a6228299b63f70bda81348c33a71611f30f5ae224762d935d544d7f
font_02_sfnt_off0000a5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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