Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9d0f241a20251e…

MALICIOUS

PDF

33.6 KB Created: 2021-07-20 03:10:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f600106ef08a5daef23f6316c6a9f75b SHA-1: 2b4011c55aa274de421d0943ef74a4619facfe14 SHA-256: ad9d0f241a20251e221e03958fd8a49318d30b3a27a1fc96a0a917cf4ad5e933
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux generator' which redirects to a malicious URL. The ML classifier strongly indicates maliciousness, and the embedded links point to sites offering game hacks and cheats, a common social engineering tactic. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://netcdn.tw/app/431946152/ways-to-get-free-robux-game-hack PDF link annotation
    • http://arch-centr.ru/images/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://arch-centr.ru/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/free-coins-and-spins-coin-master_GM406889139.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_off00002aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AAE 23328 bytes
SHA-256: f97391543ee2cafc2c85c39678ea8808303090c5461459a3512aa306ccc0749f
font_01_sfnt_off00005f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F55 18912 bytes
SHA-256: 5309463fbe76d1565f736ef9ba2f6ea091ff73500df5cf449dd8e932f414fc67

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