Malicious PDF — malware analysis report

Static analysis result for SHA-256 66edf9a4957c9ea5…

MALICIOUS

PDF

52.6 KB Created: 2020-10-08 00:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4bb4c310e1991f82b41093e694b1fa55 SHA-1: 847d551c2c8217cbee7adc574b7e8b91968dba02 SHA-256: 66edf9a4957c9ea5d0ac5b18c2502e91365e0c5346de30047d3230f2cefa6278
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://cctraff.ru/strik?keyword=trait%25C3%25A9+aix-+les-+bains+maroc+pdf In PDF document text
    • http://gevudo.laviniapennino-architecture.com/uploads/1/3/0/7/130740558/4320009.pdfIn PDF document text
    • http://files.designboxdc.com/uploads/1/3/0/9/130969851/46fa287d5b13f0.pdfIn PDF document text
    • http://fogavo.moodmetals.com/uploads/1/3/1/3/131380771/5487536.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/befarebuveradozenal.pdfIn PDF document text
    • https://site-1041587.mozfiles.com/files/1041587/52679467131.pdfIn PDF document text
    • http://files.alphaspartannutrition.com/uploads/1/3/0/7/130775448/bujejofewalezituf.pdfIn PDF document text
    • http://sofarob.essexvet.com/uploads/1/3/2/6/132695671/gezedokife.pdfIn PDF document text
    • http://files.cherishcreamery.com/uploads/1/3/0/9/130969922/867647.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/68afceba-7801-4685-a7ee-333c83b402ee/58371273264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72679c45-a034-4404-829b-8c7367b1152d/44785467474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd43738-370c-4d81-900b-55b7e717858b/vakiverutipogoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e067d6-d603-49c1-91fa-40b2cde61c1c/53379977574.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_off000072fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 5632 bytes
SHA-256: 7b414264461da390f007e3c92f391ff3fd2ec936bc6798a0f67215193a46bbd8
font_01_sfnt_off000085ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CA 12176 bytes
SHA-256: c0af94b4309f5fd2b9c61fc443d9d9d00f597085a988480d64c5f04fb22704e5
font_02_sfnt_off0000ac89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC89 16640 bytes
SHA-256: 6a9078997ca795fe788b5d1150e92daab9c0f66f25c43c723b51443eb320d68a