Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf35471b60bd8c0…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 21:21:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1b4e32ff125cece71295a1492e2a57e5 SHA-1: cf4a130c61589315e4fe6da9c629c52489b5eb1e SHA-256: cdf35471b60bd8c02dcdff22ceb11888061afbb1fc64063b053b014675362e17
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9865

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/how-to-hack-roblox-buiding-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/pubg-uc-exchange_GM1330123889.pdfIn PDF document text
    • https://www.bandicam.comIn 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_004_off00004fdd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FDD 25980 bytes
SHA-256: e51e72969cd2dea87bcac055dabe8fed58cc83382bb3377bba5b13e8ab5940f1
font_01_sfnt_off00008b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8D 19068 bytes
SHA-256: 0f4f70a3b16f78d12a6753989566b422bd73bb6554c53d05a30f907e25aff301

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