Malicious PDF — malware analysis report

Static analysis result for SHA-256 96be1bcad2d9508f…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 02:46:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dd57c41298f770ea3959819dd192cd3b SHA-1: 3a595676dea9b34c0cb3f4e4f381fdc07ba3944d SHA-256: 96be1bcad2d9508fdfdadef831b09cfb836b27aa08ab7bb93df3e579f9e4c791
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links that redirect to a malicious domain, identified as a game hack generator lure. The ML classifier also flagged this PDF as malicious. The embedded content suggests an attempt to exploit user interest in free game items, likely leading to a further compromise or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spins-and-coins-coin-master-2021-link-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-games-getting-hacked_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hacks-para-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
stream_004_off00004f03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F03 24052 bytes
SHA-256: 3e93f1b860687353ec615aa626a36ce29916fa6e9c0476b86e526cd0ba6ff0bc
font_01_sfnt_off000085a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A3 18632 bytes
SHA-256: e5cba94a653a55f068ca82f0c7712f51eecd5e3013a204785266329deafd7ed1

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