Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7164bdb8cb32d22…

MALICIOUS

PDF

44.1 KB Created: 2021-06-09 10:32:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 848a844eed6106ba8c15f85e74b67e3d SHA-1: 30d074220a905800391b770ee45f3eabd968726f SHA-256: a7164bdb8cb32d220ab70a3cd05c4ebfba9e6610cd1544bbb29801f37e9a905e
122 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks, specifically referencing 'Hack Roblox Flood Escape 2', and links to external URLs. The heuristic 'SE_FAKE_CAPTCHA' indicates the document likely presents a fake verification prompt to trick the user into clicking the malicious link. The primary malicious URL identified is https://netcdn.tw/app/431946152/hack-roblox-flood-escape-2-game-hack, which is likely a redirector to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/hack-roblox-flood-escape-2-game-hack PDF link annotation
    • https://ogm-goettingen.de/images/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/set-you-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-get-free-robux-2021_GM431946152.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_004_off00005009.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5009 24380 bytes
SHA-256: 1c68ffa8aa8d66a0c3e2c364311eb500b63a380554f0546665fe85683a79ddad
font_01_sfnt_off000087c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C8 18820 bytes
SHA-256: 81a039f1c88f557b89f0cd58059e30d72a02cea7a189aa28873bc4c6da7ecd33

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