Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6f45a94e5e6d36…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 11:23:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d52a09e2530fee5c48815844aed95458 SHA-1: 1d0a9dcebb4243dc156a19d5a128932e372bc737 SHA-256: 8c6f45a94e5e6d367bcaa6eccc622be867d20c47ba219e61fa1f207ed0f3aa0a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw' that is explicitly flagged as a game hack redirector. The document body also contains similar lures for game hacks and free currency. This suggests the primary purpose is to trick users into visiting malicious sites that may host further malware or phishing content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-xyz-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/how-to-get-adidas-shoes-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/fightforglorton-free-l-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-de-roblox-robux-para-pc_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-pokemon-brick-bronze-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-robux-for-free-on-android_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/como-hacker-roblox-en-ordenador-en-1-paso-robux-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-999billion-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-ninja-simulator-2-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/stop-it-slender-roblox-code-for-free-autfit_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-somebody-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-robux-hack-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-defenders-of-robloxia_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
stream_002_off000033be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BE 22936 bytes
SHA-256: 52b307fa401dda2063a732c600ee86a84e6234bd3111a03f5fda490550235290
font_01_sfnt_off00006732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 18496 bytes
SHA-256: bd2c90d618eff90014fde70917c30f451870fa3342cf3e365369efdfab30b31e

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