Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a040b9e1a44a45f…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 08:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7478a72f5856aa773cace4fbb81e91e4 SHA-1: 54f2f3824766bc669c58c016f622a64c0cd37d9a SHA-256: 7a040b9e1a44a45f95fc4243ecb5fe238a68333ebf14b1877ef9e91c88438f39
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a "free Robux generator" lure. The document body and embedded links strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/free-robux-generator-no-virus-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/10-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-apk_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5257 26432 bytes
SHA-256: 7b13c170a1b1d6cd7cc57b5f4eaf4bc32220751d97e6d61a95bb8504ade89317
font_01_sfnt_off00008f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F99 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC3 18600 bytes
SHA-256: 5c85c66896678291db93c261447bf2866d1ea95c6d0d4852ec7920e187d4a863

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