Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6db7ed2b6c0403…

MALICIOUS

PDF

41.5 KB Created: 2020-10-13 06:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a3aa5fb3b139851bfa2bc729ff4512b3 SHA-1: 918be9619af92d7a6ebb9d9157eb902372965397 SHA-256: cd6db7ed2b6c0403f1fda6bddc6a2910617b4a10892ed52df87e9f80068224f1
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://cctraff.ru/strik?keyword=organisational+development+strategy+pdf In PDF document text
    • http://files.swbl.ca/uploads/1/3/0/9/130969791/tugejun.pdfIn PDF document text
    • http://files.countryrddesigns.com/uploads/1/3/1/4/131453989/0a78d793.pdfIn PDF document text
    • http://sefex.opendoorbozeman.org/uploads/1/3/0/7/130738970/2176608.pdfIn PDF document text
    • http://berod.ddscientific.net/uploads/1/3/1/4/131407558/miwedurifi.pdfIn PDF document text
    • http://files.placeworksdesign.com/uploads/1/3/1/4/131453255/3858956.pdfIn PDF document text
    • https://site-1039768.mozfiles.com/files/1039768/40470107527.pdfIn PDF document text
    • https://site-1042448.mozfiles.com/files/1042448/lalujulezozewasikawix.pdfIn PDF document text
    • https://site-1039565.mozfiles.com/files/1039565/vexudupojikubabubuwuvo.pdfIn PDF document text
    • https://site-1043832.mozfiles.com/files/1043832/83109773226.pdfIn PDF document text
    • https://site-1038338.mozfiles.com/files/1038338/73406519233.pdfIn PDF document text
    • https://site-1036883.mozfiles.com/files/1036883/96944554980.pdfIn PDF document text
    • https://site-1036632.mozfiles.com/files/1036632/52951300394.pdfIn PDF document text
    • https://site-1039848.mozfiles.com/files/1039848/kakiworuxidabi.pdfIn PDF document text
    • https://site-1039280.mozfiles.com/files/1039280/sunofiruked.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/1/0433/1077/6473/files/gerald_massey_natural_genesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4503/0550/files/92092207137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1371/3315/files/75898288318.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_off00006386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 5548 bytes
SHA-256: b140832566abef727baf9f1779b8a89d0963fa0693a3fc96a915d1ba0ed0f2d1
font_01_sfnt_off0000765d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x765D 10064 bytes
SHA-256: 164f927802fd4ce6ef196f3b7df5ecab30de7dc82fd13e48b1ec0b3bb75d1e64