Malicious PDF — malware analysis report

Static analysis result for SHA-256 70af8501a29f3113…

MALICIOUS

PDF

35.7 KB Created: 2021-07-09 06:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ed94d0146e8e91ca51cb18a7659e6e68 SHA-1: 0db9c832cdeed71e9bf9991962817aec7cfb2595 SHA-256: 70af8501a29f311372fea1160c9ef00d8f25f7445cd10fac62edd2812251d0a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to redirectors, specifically targeting users interested in game hacks and generators for popular games like Roblox and Coin Master. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of these links. While no scripts were explicitly extracted, the document's structure and embedded links suggest it's designed to redirect users to potentially harmful websites, likely for malware distribution or phishing.

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/roblox-robux-generator-tool-game-hack In PDF document text
    • http://ghi.dk/billeder/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/i-hacked-my-haters-roblox-account_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/download-roblox-free-on-mac_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/games-on-roblox-that-you-can-play-music-free_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-coffre-vesteria-free-weekend_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-dll-hacks-for-free-download_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/robux-spin-wheel-free_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-roblox-studio-ship-parts_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/make-free-robux_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_off000033a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A4 23040 bytes
SHA-256: aea3b7b543475a4511879e423a7ff8b115600b289ee77c15c2fb75cc11466713
font_01_sfnt_off00006762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6762 18728 bytes
SHA-256: 70f2c4ea328fadd885c7369f1fde56bda459aa99a356c775820297956579b256

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