Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1950d237d73da3…

MALICIOUS

PDF

40.1 KB Created: 2021-05-02 13:28:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ea34e510eddfb2c8cc3082735cb7790a SHA-1: 5b88b4b42ac415077a1aaf0893906e30d6e0b05e SHA-256: 7f1950d237d73da37f8fb58ad49963f6b65fa02841267c446907dff78565392d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to what appears to be a game hack generator, which is a common lure for phishing and malware distribution. The primary link redirects to malicious infrastructure, indicating a high likelihood of payload delivery or further malicious activity. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/431946152/hack-jailbreak-roblox-2021-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/inject-hack-app-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-pants-adidas.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-promo-codes-roblox-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-gift-cards-not-used.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-for-free-glich.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-robux-free-sin-pastebin-2021-con-jugar.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-clothes-that-are-good-on-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-do-script-hacks-on-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/is-there-a-way-to-get-free-robux.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-dbo-stat-hack.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003fa5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FA5 25092 bytes
SHA-256: 99e8360e68c3be24f28f99c12791a060d74165c8a8b1d01e5a904cab36a66bff
font_01_sfnt_off00007926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7926 18868 bytes
SHA-256: 0ec2e15c54632a9092048c50831772dec4a2b1e429bc99d81a31ee9784acbc4e