Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2de8c5d31c247e…

MALICIOUS

PDF

49.1 KB Created: 2021-06-09 04:29:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 86de44a1abc013f0f226798bc08fed38 SHA-1: 6621ea2a609caf142d172a0e1b00208b4bc44840 SHA-256: 8c2de8c5d31c247ea47ddfff6da8a274f233aca7169e780a30204bfc5d10f0a6
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains a lure for game hacks and free in-game currency, directing users to a suspicious URL. The presence of a 'download button' lure and an MFA lure suggests an attempt to harvest credentials or trick users into downloading further malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/how-to-install-roblox-hacks-game-hack PDF link annotation
    • http://berntfoto.dk/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/tiktok-free-pizza_GM835599320.pdfIn PDF document text
    • http://berntfoto.dk/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-no-human-verafaciton_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://berntfoto.dk/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-sites-like-rocash_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://berntfoto.dk/images/how-to-be-a-plus-member-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://berntfoto.dk/images/roblox-free-hair-girl_GM431946152.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
stream_004_off000052a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A4 26032 bytes
SHA-256: 70adf6581217431bb40019d0d5b4f9f0e59e7208be733d9ca379b0369f3c65e4
font_01_sfnt_off00008faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAF 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C56 18452 bytes
SHA-256: 8f2bfcc1644a777883c48c01fec1ec51cc2fa9c77d23e5c3e460b46c79b90a84

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