Malicious PDF — malware analysis report

Static analysis result for SHA-256 9348a2386498cfe6…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 16:21:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e188d5c05554f6194625c9cc5f13736a SHA-1: a1b728fb23b81dcf847c266b285ff689f447dcd1 SHA-256: 9348a2386498cfe63f967a0c8da1275c801901d3d498954402bb6f2a8745393e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games like Coin Master and Roblox. These links likely lead to malicious sites designed to exploit users or deliver further malware. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/406889139/coin-master-game-hack-app-game-hack In PDF document text
    • http://projectunionstreet.com/library/repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hacks-on-roblox-broken-bones_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/cute-outfits-for-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-roblox-items-generator_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/loli-hacks-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/i-didnt-get-my-free-spins-in-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
font_00_sfnt_off00003181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3181 22132 bytes
SHA-256: 83a9a5e1f804bd51e762522fe8dc8016cd2076114a6071509bb6b9aafa16d0d2
font_01_sfnt_off0000628c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 18440 bytes
SHA-256: 571ab4b458d0dac508f9535f575fba5b7e94d60ff2bdf8022b00b4ca59ab09de

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