Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2626d92d18b28d…

MALICIOUS

PDF

44.8 KB Created: 2021-05-19 01:08:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f680b0894487e19ac0fd463b421a3b5f SHA-1: bd2bf75b633bdda29bd3366310fb97f18886cef1 SHA-256: 3b2626d92d18b28dc0f8e25deecf263d7e71d42ea4519644a7dea011a5d0a8d2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'free Robux' or 'game hacks', a common lure for phishing and scam operations. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate malicious intent. The document body, though partially garbled, contains similar keywords and URLs, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be directing users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.xyz/app/431946152/free-robux-with-no-survey-game-hack In PDF document text
    • https://ceranique.nl/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://ceranique.nl/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • https://ceranique.nl/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://ceranique.nl/images/download-hacked-games-coin-master_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_off00004afb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AFB 28416 bytes
SHA-256: 68a84489b48b8efa325fa8c27866447cee1bedaaf7e16e563b2c276051c6f979
font_01_sfnt_off00008b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2E 18896 bytes
SHA-256: c9a06fd84da7c680e9235c6c693ba85d62e2f793adf65e6d39442d95d7fb6fc9

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