Malicious PDF — malware analysis report

Static analysis result for SHA-256 b18c9981da849910…

MALICIOUS

PDF

34.1 KB Created: 2021-06-21 05:36:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c6f82ec6eb05dd4158874eb9d748875a SHA-1: 57108d4b55026e06678ed85678f6264facd32f43 SHA-256: b18c9981da849910e11280a16eed2626ba839777ec9e4d004253a2391dc5d33a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure appears to be related to Roblox and Coin Master. The embedded URLs suggest a phishing or social engineering attack aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded links strongly indicate a malicious intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/bit-slicer-roblox-infinity-jump-hack-game-hack In PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-esp-aimbot-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-make-a-group-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/pet-simulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-avatar-free-boy_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/zephplayz-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-hack-no-human-verification_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B9E 22692 bytes
SHA-256: e965fd4c26b5653aeb04e5e5cb3ff025b2f2ad031cff4407e21f05d1d124a98d
font_01_sfnt_off00005e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4A 19800 bytes
SHA-256: 63055636282509e306b663237d2440d802144dbe6cde762dca76f2fb7db2708d

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