Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca275481a8a7f06…

MALICIOUS

PDF

44.8 KB Created: 2021-06-09 14:22:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3fd044b15985dc53ea3f0f908b0a80d8 SHA-1: 6c97f33075b24a4434cea200ca2cb85f564bc189 SHA-256: 1ca275481a8a7f062a208de968cd0015fc895cb9328ef08a5dfd962e04f44aa0
82 Risk Score

Malware Insights

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

The PDF contains a link that acts as a lure for a 'free generator / game hack', indicating a social engineering tactic to trick users into downloading potentially malicious software. The document body and heuristics confirm the presence of external URIs and a visual download button lure, reinforcing the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-apk-october-2021-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-minecraft_GM479516143.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_004_off00004fbd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FBD 25456 bytes
SHA-256: eb18b1e2cf93b40edcf2e3ac5f0ce91746ef129accc34ae4148543a43e031b28
font_01_sfnt_off00008ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB6 18864 bytes
SHA-256: 3bf64d9b23260d37e7316eea504e5c716cadb165c904b50ccf75ac64b9c9e477

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