Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec8933936a6876b…

MALICIOUS

PDF

46.3 KB Created: 2021-05-12 03:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fb8e15f968b4867aeb9cbd4c0ed57a85 SHA-1: 20cd6d7dbf1052ab27dc15ba2f70d01fc61215eb SHA-256: 2ec8933936a6876bb2eef77f757c5612519bccbf83681a7c2660fdfc9832a03f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector for a "game hack" lure. The document body, though heavily obfuscated, contains references to "Coin Master Hack Spins 2021" and a URL pointing to similar content. The presence of multiple links and the lure suggest a phishing or scam attempt, likely intended to lead the user to a site that may host further malicious content or attempt to harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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-hack-spins-2021-game-hack In PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/master-coin-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2kukar.sch.id/__statics/gudangsoal/files/real-free-robux-codes_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
font_00_sfnt_off00004e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E58 26088 bytes
SHA-256: 3141532906c4f2ab35449b5c91676f6bd73d54a1d5af1aa8597ebadca2b3564d
font_01_sfnt_off000088a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A8 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off0000924b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924B 18296 bytes
SHA-256: 61cecf6a4c388f1fb11619cb83ff3032a0515dcce7f43e45d64b24393b5c3288

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