Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa54e6353b68cc8…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 07:58:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3292e21f7d3b3ccc0e40a9e2003a3212 SHA-1: bf1a5238394645f9b62a4040a62ba7d05e1a39e9 SHA-256: efa54e6353b68cc8d12844e984ffe2f846f0fb91e61ab0e26cb055170c7aaf45
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game hacks or generators. The primary link, http://netcdn.tw/app/479516143/minecraft-sign-up-free-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-sign-up-free-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/free-tiktok-followers-com_GM835599320.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/alone-battle-roytale-roblox-hacks-script-copy-aimbot-esp_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/bloxburg-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-clown-van-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-prison-life-roblox-2021-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-web-tool-roblox-descargar-gratis_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-100-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-gift-card-roblox-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-legit-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-de-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-cookies_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-do-people-hack-roblox-accounts_GM431946152.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
font_00_sfnt_off000032a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A0 22092 bytes
SHA-256: 7330c0ec6f7c9ed8f54910810e5e8d7fdb67ced7f14bd4777a9a867659368b83
font_01_sfnt_off000062eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 18220 bytes
SHA-256: 6236314a17f57ecfc4f63da4a6b9cb2d9143cd94f6dcae1b1ce204d4da3deb21

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