Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d363f8f6a1116b3…

MALICIOUS

PDF

43.0 KB Created: 2020-10-08 01:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f5c4f8b2074e64e680c38f02d557baf9 SHA-1: b59c1f8883b6760529f2dc5136613a75a73a6756 SHA-256: 9d363f8f6a1116b333103e82d79693c9821ccbe6349dfa944ea016478d9d9360
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a reference to the same malicious URL, suggesting an attempt to trick users into visiting potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/strik?keyword=monster+super+league+cheats In PDF document text
    • http://files.nichellerenee.solutions/uploads/1/3/1/4/131437308/8293b75a.pdfIn PDF document text
    • http://tatanudav.gabrielleglancy.com/uploads/1/3/1/4/131412032/zilatusebif.pdfIn PDF document text
    • http://tupifev.valeriekabov.com/uploads/1/3/1/6/131606248/532040f4c.pdfIn PDF document text
    • http://dosed.prknowledgehub.com/uploads/1/3/1/4/131407836/752fc4.pdfIn PDF document text
    • http://tabived.simonetteberry.com/uploads/1/3/1/8/131856772/vanifudolaxuwalinif.pdfIn PDF document text
    • https://site-1039544.mozfiles.com/files/1039544/8227658760.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/38797396086.pdfIn PDF document text
    • https://site-1041765.mozfiles.com/files/1041765/xojupotefetufikupin.pdfIn PDF document text
    • https://site-1038725.mozfiles.com/files/1038725/24889106599.pdfIn PDF document text
    • https://site-1043958.mozfiles.com/files/1043958/50705108890.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/1/0435/5905/9615/files/xaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7198/1718/files/61367142389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4095/9383/files/third_space_coffee_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2337/4752/files/26_gallon_air_compressor_kobalt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d51916-3d7c-4eac-8b82-66b3ec6a3739/33796773148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24563d60-08aa-4b73-a016-0342f332a9b4/74865603391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b555f2b-9d7e-4d15-8e30-b81eeac691b6/voxodowinusedasakinezigi.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_off00006a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 5200 bytes
SHA-256: 0124cb9499636027677b9b1f4c12fcd6af5c1adc96170115c1ae89b34000cf3f
font_01_sfnt_off00007c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C04 10224 bytes
SHA-256: 07c6594b209051bb9d04d74b19875e6264f3423cd7b4ca3642a94bada0a02a38

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