Malicious PDF — malware analysis report

Static analysis result for SHA-256 844a4cf739f9f82c…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 15:29:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8ac383cb51a509f3b2d66e756cecdd1c SHA-1: 4d00824485b4d89f5691782564710d6f8e7d8735 SHA-256: 844a4cf739f9f82ca534fc55e7951271edbb78d84cedf039ae6f0e933ea380d5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that lure users with promises of free game items and hacks, such as 'free roblox avatar drawing' and 'coin master free spins'. The primary URL, http://netcdn.co/app/431946152/free-roblox-avatar-drawing-game-hack, is flagged as a redirector for game hacks. This suggests the document's purpose is to drive traffic to malicious sites that likely host malware or phishing content.

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.co/app/431946152/free-roblox-avatar-drawing-game-hack PDF link annotation
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/hack-roblox-powers_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/the-roblox-hack-of-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/hack-to-beome-supertall-in-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-get-money-in-roblox-high-school-cheat-engine_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/www-coin-master-hack-tk_GM406889139.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_off00003058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3058 21736 bytes
SHA-256: 5ef2984cc6fcbb36e1598c7b02646f82dce393913aa558bee40444496357e604
font_01_sfnt_off00006023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 19320 bytes
SHA-256: c00b175dd34d538cd72380171d1fc981a2994ed60d18c999514a4ab7625aea78

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