Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23dc1db7d8cbe53…

MALICIOUS

PDF

43.6 KB Created: 2021-05-15 01:42:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c0ce5c87cd42dd4a7bf1bbf75aa940cc SHA-1: cab5a127f7919ff6d64472210f71fa016f7be35f SHA-256: d23dc1db7d8cbe53548c45914d0f27c93e8d4b03ac20e07ff3f9aec739acec2e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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.xyz/app/406889139/how-to-get-free-food-for-foxy-in-coin-master-game-hack PDF link annotation
    • http://ig-tauchen.de/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/coin-master-free-spins-and-coins-group_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
stream_003_off00004bcc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCC 25624 bytes
SHA-256: 4ee82274aea08657528178a60a827c51e9decfc06c2bd82a9e8dcac068761199
font_01_sfnt_off000087b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B9 18440 bytes
SHA-256: a2fd22afb07b2ab97191ea58f041a8e540c79d47e96b45ccd375a5553ae49956