Malicious PDF — malware analysis report

Static analysis result for SHA-256 d657879afcf63743…

MALICIOUS

PDF

34.6 KB Created: 2021-07-26 12:40:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 66f832db2d8b167a466b26955dcf4ee2 SHA-1: 97a789ed50a0999f6544b4cfe9624238577eb4dd SHA-256: d657879afcf637434f5dc5d910830f4902849f79ba0a81e061c11203b8934b87
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of free in-game items and followers. The primary URL, http://netcdn.tw/app/835599320/free-tiktok-followers-no-verification-or-survey-game-hack, is flagged as a redirector for game hacks. The document body also contains a call to action to download a TikTok generator. This suggests the document is part of a phishing or scam campaign designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/835599320/free-tiktok-followers-no-verification-or-survey-game-hack PDF link annotation
    • http://aimp-market.ru/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000308b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308B 23168 bytes
SHA-256: bf878259a612c3352da2e49d662f48935fe5724e6c174472ee460af08fed9dca
font_01_sfnt_off000064ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 18492 bytes
SHA-256: 4d8c0727d58b59d2b63319bab821bc095baa93826ac3da826e0a8bde5531d4a4

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