Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef1009ed5c3807c…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 13:35:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cc61c679173dd1d86424bafbf4c6a6e8 SHA-1: 9c3c27baaddca9e0e9ad5dea51b7c535ac41b494 SHA-256: cef1009ed5c3807cf18d6f38afe6a0ad5041609f3b421803c8f7b02d22cbeec6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and generators. The primary malicious URL identified is https://netcdn.online/app/406889139/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index-game-hack. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id//repository/pokemon-go-free-90-iv_GM1094591345.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/who-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/pokemon-go-free-apk-download_GM1094591345.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/pokemon-go-free-evolution-trade_GM1094591345.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-free-robux-without-verifying_GM431946152.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_off000053ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53AC 25060 bytes
SHA-256: fe999452472dce339d8ff0718fa61ac239bb2221a48a80bbc0acfcf969773c58
font_01_sfnt_off00008d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2A 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off000096c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C8 19440 bytes
SHA-256: 758f131b5ad06ada387de192ccba962ec8204edab22f872f65cf4aad9f2ca4c6

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