Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef15b14611d4834…

MALICIOUS

PDF

46.4 KB Created: 2021-06-09 02:14:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7cd338b67da97a0fdaec998b9b3b85e2 SHA-1: 906ffa7b844666e52d36c0467b52ccd6751b25e1 SHA-256: 7ef15b14611d48349e411c9c8e5052529e7a0d3b1207d2240d29c734d2ec0dda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The document's content and embedded URLs strongly suggest a social engineering tactic to drive users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • 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.
  • 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.tw/app/431946152/free-robux-obby-link-in-august-2021-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-adder_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/pokemon-go-free-quick-catch_GM1094591345.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-hack-app_GM431946152.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_off000053ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53FF 26764 bytes
SHA-256: db2adfe7a3e832300094f0b8d78697afa3bc929c22c18705a333702f6f0d9a67
font_01_sfnt_off00008feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEB 19276 bytes
SHA-256: c6b9105c1f5251e1d9d14ea45f30c150390bb2be64114519f711932c67ca60f4

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