Malicious PDF — malware analysis report

Static analysis result for SHA-256 c641b3da0089d4b2…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 00:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5de8d5ac2e98c0ebb238e0ea84d61245 SHA-1: 264fea662556f95dd842c51d4181bc1a6cd01a4a SHA-256: c641b3da0089d4b2698ee557f5b19753981a6c3ddbc58f9c76211cc3e189bc89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free Robux, directing users to a malicious redirector URL. The document body explicitly mentions 'Robux Hack For Apple Ipad' and includes a call to action to access a 'ROBUX GENERATOR'. The presence of embedded URLs 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 0.9980

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.co/app/431946152/robux-hack-for-apple-ipad-game-hack In PDF document text
    • https://www.tena-g.hr/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-online-roblox-tycoons_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/mcpe-com_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-hack-someone-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/tiktok-free-movie-hack_GM835599320.pdfIn PDF document text
    • https://www.tena-g.hr/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-test-site-hack_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://tena-g.hr/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-tix-hack_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/win-free-robux-robux-robux-free-new-game-order-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-guest-shirt-free-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-hack-draw-it-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/hack-coin-master-apk-mod_GM406889139.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_off00002eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EED 22416 bytes
SHA-256: ae647589ffbed45c238e7c1f63ec2d238805295d486ae26dcb45020162100dc0
font_01_sfnt_off000060de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 19312 bytes
SHA-256: adcf9466ac70c0ca3169397ce78284d470178448baf834990e7728782c31278d

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