Malicious PDF — malware analysis report

Static analysis result for SHA-256 156a6b91299a6b14…

MALICIOUS

PDF

34.2 KB Created: 2021-07-19 04:11:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4eb1634557c7714339ba0ffeac799a4c SHA-1: e27296c033cee22df4072dd039d66fb437c5cee0 SHA-256: 156a6b91299a6b143efe41d3659c277699ee25627ccf87fe0ed864ec56ce8c84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a critical link identified as a malicious redirector for a 'free generator / game hack'. The document body explicitly mentions 'Get Free Spins Coin Master' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a lure for a scam. The presence of embedded URLs and the nature of the lures strongly suggest a phishing or social engineering attack aimed at tricking 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 critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/get-free-spins-coin-master-game-hack In PDF document text
    • https://successfulauto.ru/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://successfulauto.ru/images/minecraft-free-download-chromebook_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_002_off00002fdc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FDC 23432 bytes
SHA-256: 037e71843a051d93cd79e52d5bcea5e20107ccb0260a46b6a0db8652c65fc376
font_01_sfnt_off000064d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450