Malicious PDF — malware analysis report

Static analysis result for SHA-256 428c627f2668775d…

MALICIOUS

PDF

35.5 KB Created: 2021-05-22 03:40:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 58e33334227b6d46374372e82a91b4c6 SHA-1: 534510428c6b9eca1ec265691ea73b313339932e SHA-256: 428c627f2668775dbeb4eb8d973fba0851eb855f0c5784e2e9d75f9438cab99c
220 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and free coin generators. The document body explicitly requests users to 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a social engineering lure. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

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.
  • 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/coin-master-free-coins-and-spins-game-hack In PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://learning.ma-negerikarimun.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-2021_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_off000030da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30DA 25172 bytes
SHA-256: e896694900613b9dbbf18fec5c53ea905788e516e0d254b591228086a7329858
font_01_sfnt_off00006a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A07 18060 bytes
SHA-256: f77ee24e01944806ea28e16fd73427a54f7109e241804df06ce657d8c6d11cfb

Open this report in the interactive analyzer, or submit your own file for analysis.