Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc4a410df5d6596…

MALICIOUS

PDF

29.9 KB Created: 2021-07-22 06:52:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7f4e1477d11492948e76e75f3f616f14 SHA-1: c31844c5e6f1b74e62e2a986f8e498c0c8674012 SHA-256: 2dc4a410df5d65968d298a07fd469ad03a94501813fd4600bd15a5d90d8fc8ed
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector, masquerading as a 'free generator' or 'game hack' to entice users. The document body explicitly contains phrases like 'CLICK HERE TO ACCESS TIKTOK GENERATOR', reinforcing the lure. This indicates a phishing attempt designed to trick users into downloading a potentially malicious second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0560

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/835599320/free-likes-on-tiktok-game-hack In 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_off00002208.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2208 22964 bytes
SHA-256: 360dbae8c33ac935c0f43e8ecb7c4b1d9b3130b8716764adc6d4a2d15c6e5630
font_01_sfnt_off000055b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B5 17456 bytes
SHA-256: 68a974c9aa3c870eecc965d525ccb957938ff5f02ba9183d05fa54c35671def6

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