Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c01f8cf581b3d5…

MALICIOUS

PDF

51.1 KB Created: 2021-06-09 02:27:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8e082062a08e9d73eacf1da7e012c81c SHA-1: 871d2eedf16bd747a61b9032d76bc5928fb09221 SHA-256: 07c01f8cf581b3d5ec65e5bc8fd80c54bf45e4b26987b9defe0dc1629134342c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. The embedded URL 'https://netcdn.tw/app/431946152/lavar-hack-com-roblox-game-hack' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be part of a lure to entice users to click the link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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.tw/app/431946152/lavar-hack-com-roblox-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/does-roblox-hacks-your-bank-account_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/tiktok-free-movie-website_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/best-free-roblox-schirts_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005324.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5324 30428 bytes
SHA-256: 0df91f94fe7cc20f8a96b62705f70591fbe8466ca86b0e22dcc0f4e9d131c82d
font_01_sfnt_off00009748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9748 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA45A 18556 bytes
SHA-256: 799f3ef47a7928758f68bf868dbc12b4e58abd1c6f4034112de9d5c42d99d71c

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