Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48533dd6f890f3e…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 13:45:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4c820d4d1054ae450e3d0ede13771c5f SHA-1: 4f771a86d0d986f2617ea1f9ab357c02432f1dae SHA-256: a48533dd6f890f3edc9843cacd500aa4635593e75b0b8a4ebb0af8cfcb9f76e8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/is-minecraft-dungeons-free-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/why-pubg-uc-is-expensive_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-now_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_off000055c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55C1 25136 bytes
SHA-256: fb5300d24c426284ef7a726b9fdf43fcc65173de0837e95f32c611d4a029cb65
font_01_sfnt_off00008ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED3 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000098be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BE 18304 bytes
SHA-256: ce690126d5ef6938f3c3401fec90eb29b657d34ca06495398573f2a883063706

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