Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad01f21faf0e3c3…

MALICIOUS

PDF

36.4 KB Created: 2021-07-07 14:02:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7c4a5d0d74b899f3c63a057009b6d34c SHA-1: 6aa224725ee69a60d29fe6a43115d463d896cd74 SHA-256: 5ad01f21faf0e3c397cb51a39123ab0a5f3f7adf9ef0cd2afe5d5bb04ae6c196
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that point to known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/free-robux-giveaway-live-game-hack. The document body and embedded links suggest a lure related to 'free Robux' or game hacks, a common tactic for phishing or malware distribution. The presence of multiple malicious links and the ML classifier's high confidence score indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-giveaway-live-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-para-descargar-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-cheatsclubroblox-hack_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-thank-you-tags_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-dominus-free_GM431946152.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
font_00_sfnt_off00003548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3548 22940 bytes
SHA-256: cee2c86f2e6c0b5520b4138ab0bb1348546a46420e89a38255b8ad3697fd09d2
font_01_sfnt_off00006892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6892 19296 bytes
SHA-256: 0352292dbcbf26e7fc0de087e3b3baebc7cf90a2f8a47f67a80d89effc18d76e

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