Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8586acf332b845…

MALICIOUS

PDF

49.8 KB Created: 2021-06-09 09:51:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3e65c764b4df819ea26902861b3cc517 SHA-1: 2534cd76ce2db3361b9d6d8bd1f8dabde6cd9eb6 SHA-256: ba8586acf332b845020a0a1e36cd08252d526b37879f0913e17eb7720cd51d07
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically targeting Roblox users. The embedded URL leads to a site that likely hosts further malicious content or redirects to phishing pages. No scripts were extracted, but the primary attack vector is the malicious link embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-script-hack-gui-game-hack PDF link annotation
    • http://zercalo.org/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/www-free-robux-hack-generator-club_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/how-to-create-a-shirt-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/quel-touche-faire-pour-avoir-le-free-code-dans-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CB 29032 bytes
SHA-256: 807f303cf27752c0ad627bd86f86a27c91ddf9c4e426ca3e900b2626b6ec6cac
font_01_sfnt_off00009466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9466 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off00009e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E77 18724 bytes
SHA-256: c4ba931fe70cc69c0332736f5015f8948db7defcdb29b68deef0c0a18f72770e

Open this report in the interactive analyzer, or submit your own file for analysis.