Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f2084ea63c7c64…

MALICIOUS

PDF

61.6 KB Created: 2020-10-09 17:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 14214f4f97f16374d0dd1208b2305ea8 SHA-1: e4fc023e2c17bbda800d20373919039694a53ea0 SHA-256: 59f2084ea63c7c64572c8506e569d7060a4fa5bd08f18f7321f2f2a9edee5f83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous links suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

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 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.
  • 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=intradermal+injection+degree+angle In PDF document text
    • http://nefujo.fashionspeaks.net/uploads/1/3/1/8/131856166/81317657fadde28.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/1eab86c7-c922-4ebd-81b0-f2b066874012/76607247445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/360dc986-ca60-4f56-9a47-e318fc870244/xoxudisuponifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e67ad87-92da-4450-af85-cc7ff7f72108/35021385694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a78887-f4d3-47b5-8a22-4f0b343db3c2/50185451651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeca0bb4-c9e4-47fd-82f6-52b8bd670685/lalajobomola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88383f7-605a-4aa3-98b8-642800d7d1c4/xeriwulivelofuwebivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a47ae87-e127-47c7-aca7-e0aa4aed6f60/neguxewoximusuxoliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fed432a-9928-46bd-874c-57e4c662eb94/razovuxinogunenina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/475adf40-e0b8-4628-abb6-8797cc87a7cd/nepitun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b088df3-2e86-4afd-8b05-9f0fe5aa7651/dojogokojenovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23c844d-9e30-4989-8e04-e49de0a262df/64304121662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32c2756-7ee6-4b3c-b488-9794de0fa002/zidimekalujiniganedafeju.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_off0000a59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA59F 4884 bytes
SHA-256: 61c77c2109cf830d5706fde7d214fc92308fc8690fd25bc263486940c8ef5341
font_01_sfnt_off0000b60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60C 11220 bytes
SHA-256: ef92a5cd36a07a4ac178d914a78bc4d5120532344eb76278845d0c652bd70cef
font_02_sfnt_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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