Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d5cd0269ddf3e3…

MALICIOUS

PDF

53.2 KB Created: 2021-06-03 11:50:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e05fddd626df70d1e2239160d14137d3 SHA-1: a37f3a5ae385966b73a7821ce258ef8275434829 SHA-256: 56d5cd0269ddf3e3f602e4f0fb221614cb28121d122798c925adc88902d99349
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure related to 'free generators' and 'game hacks' for popular games like Robux and Minecraft, impersonating brands like Facebook. It contains multiple embedded links, including one to a known malicious redirector at `https://netcdn.online/app/431946152/how-to-gift-robux-on-mobile-game-hack`. The document body, though partially corrupted, contains references to these lures and the authoring application, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9607

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/how-to-gift-robux-on-mobile-game-hack.
  • 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/431946152/how-to-gift-robux-on-mobile-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000553e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x553E 27032 bytes
SHA-256: 1f1b7ccac98c53b090a6de569e9449304fbcc1181bf5dda5d5da2fa96ad73106
font_01_sfnt_off0000926e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926E 2984 bytes
SHA-256: 4adb8a917f49e7111d61a35b75f09762f191422f789e84659f5497848d60b01b
font_02_sfnt_off00009c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C96 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_03_sfnt_off0000aca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACA2 18508 bytes
SHA-256: 4e4801ff192b8e14fd7533e10dce0a67112ed0a3683ce7dd9491cafead6d393b

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