Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6f795f85363073…

MALICIOUS

PDF

42.4 KB Created: 2021-05-11 01:01:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2669121b18811b24f5cb7ee1bfcb4d8a SHA-1: a2d7b3fb33e1f84993515c5f88918545b90df782 SHA-256: 1f6f795f853630732eb3f5443818c02f3990a633cc31f9a01889eeaef113bd01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and free spins. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-25-game-hack, which is designed to trick users into clicking through to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a social engineering tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-daily-free-spins-25-game-hack In PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-download_GM479516143.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_003_off00004c05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C05 23956 bytes
SHA-256: 1e4d3b08f771f862081caaa1d71e84b8c6ee3bad22b887ee98a17e97a792f53d
font_01_sfnt_off0000824c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 18568 bytes
SHA-256: b4b281bb5b6dfe092bf3b90adf491610ab408f1d3fe0f6ae1605b441ac4007a5

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