Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d7924199b33331…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 02:59:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 86496246e2b8619fbda20a0915b1ddf2 SHA-1: 4f0663a1783527b14bb5afcd40512ca646c8a5fa SHA-256: c9d7924199b333312de152003852401790b59510a6bcbaafe7170f122e9b1f12
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-hack-values-roblox-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-to-play-minecraft-servers_GM479516143.pdfIn 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_004_off0000533f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x533F 25352 bytes
SHA-256: 15283ad1cee89aa6d3cad9bf34e89600f69eac5ecd4a2804d715f9f7da72651a
font_01_sfnt_off00008d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D64 18620 bytes
SHA-256: d8397427f144da4b7a39fea68c04a5101fe2502d75cbc3fe556d2cb79c36f770

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