Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7121f7e2c6fe4d1…

MALICIOUS

PDF

53.3 KB Created: 2020-10-16 01:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: de5ba22b56b35f83b33e957733b6bbfc SHA-1: ee91cdb1dfe05b7f4d65de4ecc2be3fa4213f53b SHA-256: b7121f7e2c6fe4d1320182db846ce87cfc4330688acb27e08666e9aa37abe4e3
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://ggtraff.ru/123?keyword=combining+sentences+using+participial+phrases+pdf In PDF document text
    • https://site-1040612.mozfiles.com/files/1040612/2020_buick_enclave_owners_manual.pdfIn PDF document text
    • https://site-1043415.mozfiles.com/files/1043415/87183914363.pdfIn PDF document text
    • https://site-1040682.mozfiles.com/files/1040682/82985228835.pdfIn PDF document text
    • https://site-1038472.mozfiles.com/files/1038472/jewiteserotalonezo.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/7009348.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/remin.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4106527.pdfIn PDF document text
    • https://site-1039428.mozfiles.com/files/1039428/pijigilet.pdfIn PDF document text
    • https://site-1039131.mozfiles.com/files/1039131/sofudifijodibi.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/67040770798.pdfIn PDF document text
    • https://site-1041922.mozfiles.com/files/1041922/16150853746.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/liwojigol.pdfIn PDF document text
    • https://site-1040771.mozfiles.com/files/1040771/pawuzaruvuziniwisebu.pdfIn PDF document text
    • https://site-1042007.mozfiles.com/files/1042007/dujedoxapo.pdfIn PDF document text
    • https://site-1038825.mozfiles.com/files/1038825/64051181185.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/5c1ce2a6-20b5-4ae0-b061-bccf2e1d4b9c/bafanimasamotin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db751a07-373e-452c-951f-526ac6be2a24/bogitodafolineguxaxigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1dd9b2a-6339-4d22-afb5-b4645efe0879/xurefisezubag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3747/9071/files/axe_manual_of_peter_mclaren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/kimadifoxakalanoxele.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0C 5612 bytes
SHA-256: 456c00f94809ea4d47e17ea588cdfdb12f4a353a64dd4865025e9691291ceaca
font_01_sfnt_off00008eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEC 10192 bytes
SHA-256: cdcc3d339b1500043c8fee6166d24cc417b3e6ebd6e8977d60b282e679055a93
font_02_sfnt_off0000b1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FE 16112 bytes
SHA-256: 275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399