Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef663e6ba5860ca2…

MALICIOUS

PDF

34.2 KB Created: 2021-05-22 15:34:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3bca78bf1617b941b9a1744fc95f25ad SHA-1: 2fd4d387cf9a151314c3f9c8d09bec16003cadc1 SHA-256: ef663e6ba5860ca2b82415bed01d33470c281d421f65be3061f7e0e0c909f1a1
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to free followers for TikTok and game hacks, directing users to a malicious redirector URL. The document body explicitly contains the URL 'https://netcdn.xyz/app/835599320/get-free-followers-on-tiktok-game-hack' and other related URLs, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netcdn.xyz/app/835599320/get-free-followers-on-tiktok-game-hack In PDF document text
    • http://swibome.nl/images/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://swibome.nl/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://swibome.nl/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://swibome.nl/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://swibome.nl/images/daily-free-spins-coin-master-app_GM406889139.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_off00003196.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3196 23296 bytes
SHA-256: 4b53968f4a66df42e1fdf2693e33c5c7a027ed68cb44c6371c4a1a818d461cdb
font_01_sfnt_off00006603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 17692 bytes
SHA-256: 927e39851add4dfd479e94c7f363911e27b11f2d7b93d82bb30fff9f618b2f9d

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