Malicious PDF — malware analysis report

Static analysis result for SHA-256 31db103b9ce16269…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 05:00:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4198a73481eae44539bbedf80c443c89 SHA-1: a99367a52182538c4587ef601ef3ed66f1f5f5a1 SHA-256: 31db103b9ce16269508a360f019b21b578922958712a4f550bac9cfe7b962cd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, specifically advertising 'free generator / game hack' lures. The document body and extracted URLs indicate a phishing attempt focused on in-game currency and items, likely to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious links and the lure strongly suggest a phishing or scamming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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-obby-2021-game-hack In PDF document text
    • http://mtsn-baranti.com/perpus/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-game-download_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_off00004b65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B65 25352 bytes
SHA-256: 02d5a618e76686de94ef11fd10dfe698256dfb2e56f5e101f7b62c92d59e0d28
font_01_sfnt_off00008653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8653 18596 bytes
SHA-256: 4ee57ed15e8700d5e4346dbed35fcc2f6ba8dbed04d546ac38088c27601a53c6

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