Malicious PDF — malware analysis report

Static analysis result for SHA-256 83fd49c44ae181d0…

MALICIOUS

PDF

53.6 KB Created: 2020-11-20 03:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47189064ef779dd91f7319c75606d063 SHA-1: 0a1ec5c27308ca15ea7aa17ee75b4f343390421b SHA-256: 83fd49c44ae181d07edbefebdd446a58f8635fbdc69b0134bdd5944332917a7b
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or SEO spamming operation. ClamAV and ML heuristics flag the file as malicious, specifically identifying it as a phishing or trojan distribution mechanism. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's primary purpose is to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7736

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=tondach+saturn+crijep
    • https://xamalebudeke.weebly.com/uploads/1/3/4/3/134326767/4102917.pdf
    • https://cdn-cms.f-static.net/uploads/4445750/normal_5f9f806637f70.pdf
    • https://vapuwunenerupig.weebly.com/uploads/1/3/4/7/134727873/sunesiwuzosu.pdf
    • https://cdn-cms.f-static.net/uploads/4415308/normal_5fa6453a6fffa.pdf
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5f95897cf2ad2.pdf
    • https://nebomigefut.weebly.com/uploads/1/3/4/3/134359696/zewidovu.pdf
    • https://fixelomutitag.weebly.com/uploads/1/3/4/3/134339240/zudifonezed.pdf
    • https://mefogogid.weebly.com/uploads/1/3/4/6/134600117/4354733.pdf
    • https://tuvexora.weebly.com/uploads/1/3/4/6/134618292/8630976.pdf
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5f9e88df2db5d.pdf
    • https://rolafaxamowoti.weebly.com/uploads/1/3/4/9/134903079/5b79e6c346.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1b30ad87-3766-4775-bfa3-7f32c6701b53/gavodumoxuwalilaniveli.pdf
    • https://uploads.strikinglycdn.com/files/4f4dafba-54e5-4e36-9b52-0a7610d6fba3/brasscraft_plumbing_snake.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a2.bin
922be2b253d2f20c46647d107f7022f900ca1ab560a95933f2fd1fa095867d9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A2 5156 bytes

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