Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baebfd6decca5d6…

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 23:58:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b15a3bc7ea4a810e4494d3cb14365b4c SHA-1: 4c2f6b07ba71dea41573aa45d33f0e6130e2eb46 SHA-256: 1baebfd6decca5d6f8385bb109c0507e57d69f4fe6080794fc5436677ba578a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free generators. The primary lure appears to be related to Roblox and Coin Master, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-free-executor-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-mod-roblox-2021-pc_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-bc-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-free-roblox-update_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-easy-2021-on-ipad_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/grand-opening-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-adopt-me-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-admin-hacks-name_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-gfx-roblox_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
font_00_sfnt_off00002f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F76 22392 bytes
SHA-256: 9e1af12c4d8473ff3296837c447e13e734551936e7a4207b964981de4a8615fa
font_01_sfnt_off00006136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 18896 bytes
SHA-256: 641cf75bbecca96e2df31d1e85298347cd1860f5929f6e14b17a62f39c4df72c

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