Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c189b903a6ad6b2…

MALICIOUS

PDF

41.8 KB Created: 2021-05-01 06:46:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 77be5bd2078bbc34cb8d4f1ce23b578a SHA-1: 1e08e65168e00f921a5398cfd780f4a576dd8297 SHA-256: 9c189b903a6ad6b21f9a3d711cd5a991db6736930ad2daf3afd587532ea7ab14
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as a 'Generator Hack Roblox Online PC'. The document body and heuristics indicate a lure for game-related cheats, which is a common social engineering tactic. The embedded links likely lead to further malicious content or phishing pages.

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/generator-hack-roblox-online-pc-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/giving-people-free-robux-livestream.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-pour-avoir-des-robux.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-tix-hack-download.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-buying-roblox-exploit.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hack-generator-no-human-verification.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-hack-without-human-verification.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-cheats-phone.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/2021-roblox-hack.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/robux-hack-no-verification-or-survey.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_off000040d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40D7 28024 bytes
SHA-256: b9fea62f47dd412ccd4b6fbdd856a539f3f89a90d8192a12f32e9466924a1cad
font_01_sfnt_off000080b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B5 18560 bytes
SHA-256: 53e559d3e11a50ecfa085c7966d0f0876c85eaf30a1ac36f077884a55a169789