Malicious PDF — malware analysis report

Static analysis result for SHA-256 78abe3c4edfff10a…

MALICIOUS

PDF

42.9 KB Created: 2021-05-19 05:05:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 48e76b8ed27d7e672ae24cabb022769a SHA-1: 219b2fb47739dae54a716818846cb048e05eca76 SHA-256: 78abe3c4edfff10adaa4eba4aaca9c63bc0eb647b13b900fb3fee281409003e5
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 0.9971

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.xyz/app/431946152/free-robux-com-game-hack PDF link annotation
    • http://www.zdravazena.sk/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/ww-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/get-free-cards-coin-master_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
stream_003_off00004928.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4928 26616 bytes
SHA-256: 1a116df8d2565b8d6e0f1171f6d95f0a981f7cf19ca5cb54f0f1404439cf0a7a
font_01_sfnt_off0000856a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856A 18276 bytes
SHA-256: d7491fe45cc88596c87233a963b6162720bf27c142cea717df16fbc09fa29ea6

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