Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba7893b19bd524c…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 16:11:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fe1f286b2b333e3373ca1c84e56e6b91 SHA-1: 20d9acf14cd24f2f6bca9159f0ba6c13d9f257db SHA-256: 2ba7893b19bd524cb1be71c47e9b27902e00b2e22f7b6504b77f58a56a43ad0f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-by-watching-ads-game-hack. This suggests a phishing or scam attempt to trick users into visiting a potentially malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-by-watching-ads-game-hack PDF link annotation
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/cheat-codes-for-pokemon-galaxy-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-robux-hack-generator-club_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/free-roblox-invitations-loadstrings-full-lua-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1bandarlampung.sch.id/__statics/gudangsoal/files/best-free-minecraft-servers_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
font_00_sfnt_off00003280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3280 21660 bytes
SHA-256: c70641a5e696ac9629dc8b0b8a00c5ccb0c44133c8ff916a9ad1a3070ff497d2
font_01_sfnt_off0000623a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 19660 bytes
SHA-256: f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87

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