Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b6ecaed2f07d36…

MALICIOUS

PDF

33.8 KB Created: 2021-07-07 00:05:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7bbf57697a6cbb7a546ba20a016caaad SHA-1: a9ea30f9262842fbd57e92315dc990a9b629a5b9 SHA-256: d1b6ecaed2f07d36f184883f8277460723b13d3ff90fe4d6968bc1c6d243ccd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The embedded URL http://netcdn.tw/app/835599320/get-tiktok-followers-free-game-hack is identified as malicious infrastructure. The document body also contains this URL, reinforcing the lure. While no scripts were explicitly extracted, the nature of the link suggests it likely leads to a further stage of malicious activity, such as credential harvesting or malware download.

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/835599320/get-tiktok-followers-free-game-hack In PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-the-right-roblox-account-pin-hack_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/hacks-de-roblox-descargar_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-spawn-in-models-hack_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-old-roblox-games_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-unboxing-simulator-hack_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/give-me-robux_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/dragon-keeper-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-high-school-free-money_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-studio-online-free_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/pubg-uc-dark-web_GM1330123889.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_off00003035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3035 22392 bytes
SHA-256: 32f62ac53c9e09fb2e9117b7d01e11549c978a8acde97891ac94020cfe833860
font_01_sfnt_off000061b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B9 18208 bytes
SHA-256: 2c913cd2b1a0bf54f87f8719ad814203ec2f1a1a3b8e3f6b6a76b442a86e84f4