Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13a4592b3475cf0…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 03:55:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3f2216dedb5f60dda8a545f77b55435e SHA-1: cd55dd76d6d27ddef242698a09da9bb16f9f61f7 SHA-256: d13a4592b3475cf0b516eac4cde7cdd8335855b685aa0df55d4a280a58f886c5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to websites offering game-related cheats and hacks, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it links to a game hack redirector. Although no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest an intent to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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.online/app/479516143/free-minecraft-capes-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-tiktok-likes-and-followers_GM835599320.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_004_off00005130.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5130 24704 bytes
SHA-256: f010c4a6ed4479992820a82c2433dd07d99f7e053c8ffb13ebf706541299dc74
font_01_sfnt_off000088b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B1 17744 bytes
SHA-256: dedc931f5c8bac627c7a83c769fddbd093390c6d69f02f50ba531346133b4d17

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