Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed4c5bfb46eddc2…

MALICIOUS

PDF

36.4 KB Created: 2021-05-11 17:07:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f130dafe7da716da85cb029a8eabdbb7 SHA-1: 5fe20415359201c4446dcba6eb075ec384b7824c SHA-256: 2ed4c5bfb46eddc248a5f7e88b851a3c40fa50746aaaf79b2cc16a7111bf255d
220 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and lures users with promises of game-related content and generators. The document body explicitly contains phrases like 'Free Coin Master Stuff' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a social engineering pretext. The presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to redirect the user to potentially harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8953

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/free-coin-master-stuff-game-hack In PDF document text
    • https://www.simplytravel.co.za/images/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • https://www.simplytravel.co.za/images/coin-master-levels_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_off0000370d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x370D 24476 bytes
SHA-256: f56bee29f40170471d31147e541f86d738d957be97632b240853237a0ff14633
font_01_sfnt_off00006e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E55 17848 bytes
SHA-256: 4433ab11b9786de2c085a569790164fdba01b80ea586efee10f18c7ad04333c8

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