Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7d3b8ee5a67b59…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 09:13:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8a5a7d4968edf7c67f8f9c8825a58024 SHA-1: 53244141ee9b2fda8f7dc9f30c32906950323f35 SHA-256: 6c7d3b8ee5a67b59a2bf8901e9f8e42c8a054af604fe815982aa96c6ec41ada1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, including a known malicious redirector at `https://netcdn.online/app/431946152/i-want-robux-game-hack`. The document body and embedded links suggest a lure for game-related cheats or currency, a common tactic for phishing or malware distribution. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/i-want-robux-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/100-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-roblox-id-codes_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0F 24688 bytes
SHA-256: 595b78404c119b77199c19ae8a71ad3a081dc6d72abc12f5a32a33c143d95b98
font_01_sfnt_off000085d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 2892 bytes
SHA-256: e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc
font_02_sfnt_off00008fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBF 18380 bytes
SHA-256: 5ceec8d4cd94d6b8e3ac451f4e39c134a85daa876f773caa5222e081c049b392

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