Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7818c2a7193c6b…

MALICIOUS

PDF

35.9 KB Created: 2021-05-21 04:54:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e9440325dde4bbc0107d165d57337e32 SHA-1: 694a475295b6aca230ae653aad90e5653cecb013 SHA-256: ee7818c2a7193c6ba67ebfade286f9743297c251a574e0a75fe5092cebe9e459
122 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one that directly leads to a 'free generator / game hack' lure. This, combined with the 'password-protected archive' heuristic, suggests the document is designed to trick users into downloading or accessing malicious content, potentially by providing a password to decrypt a payload. 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 high 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/is-java-minecraft-free-game-hack PDF link annotation
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-hacks-and-cheats_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_002_off0000339a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x339A 25268 bytes
SHA-256: 50b65eee46f0665095d44c2137ac909d4ef11eaeaa49b4facdaddf843414b844
font_01_sfnt_off00006c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 17848 bytes
SHA-256: 2812ffd3b6569d14fce824048316eedc6e3758fbb22d1025bbcec1b053185b7d

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