Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb019a55c4ffefb…

MALICIOUS

PDF

78.7 KB Created: 2020-11-18 13:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f07a49e25b334537e8a38eff78b57c9 SHA-1: 9b929be9068684bb54cef0794d602d2094950b03 SHA-256: 6eb019a55c4ffefbb39d7197375258e19a8f26ade75997e8ca1d3270f69f195d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files and a redirector URL. The heuristic firings indicate that these links are part of a link farm and lead to malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to 'Minecraft' and 'survival island seed', suggesting a lure to attract users to click on the malicious links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=minecraft+1.9+4+survival+island+seed
    • https://cdn-cms.f-static.net/uploads/4446925/normal_5fa6edecc23dc.pdf
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f874aa6306e8.pdf
    • https://cdn-cms.f-static.net/uploads/4463554/normal_5fa7cee71a95f.pdf
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5fb2d9c55fa6d.pdf
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f90cc94b82e0.pdf
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5fa6a008410d0.pdf
    • https://guburumo.weebly.com/uploads/1/3/4/3/134322172/bukasitetul.pdf
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5f914e211c98b.pdf
    • https://cdn-cms.f-static.net/uploads/4419820/normal_5f9f8bf23510a.pdf
    • https://cdn-cms.f-static.net/uploads/4428038/normal_5fa25ac23e04e.pdf
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f9b8e9d8af8d.pdf
    • https://cdn-cms.f-static.net/uploads/4385424/normal_5f939c4d0f347.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2168848e-7784-466e-ab9a-4da4b14d69cb/33524395493.pdf
    • https://uploads.strikinglycdn.com/files/55624eee-4ce8-4a60-b651-6ffad4630998/sojazitobo.pdf
    • https://uploads.strikinglycdn.com/files/7ae2c833-4ed5-47d8-adac-5e9f16c2d348/fokaxozovulebiwipu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6da.bin
b5004f697e4d94fd7ec33676b9e746395437cec87b078ff05d34d14dd31cf8ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 5408 bytes
font_01_sfnt_off0001096c.bin
fe7fae48d9fbf3442168ad1346668a64ce97723a4b7043008aad4cc0532f2f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096C 10672 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.