Malicious PDF — malware analysis report

Static analysis result for SHA-256 e121135eb794d281…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 06:12:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 46fe84df62417c3378b60d3a70a2f079 SHA-1: 345ad0035ceabbbf9f076768d8be3ff55825d25a SHA-256: e121135eb794d2811d2a86d70372c9e537dfc69069252c621dee85e64477863a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a lure for free game currency or hacks, directing users to a known malicious redirector. The embedded URL, http://netcdn.tw/app/431946152/free-robux-hack-no-human-verification-or-survey-game-hack, is flagged as malicious infrastructure. The document body and heuristics indicate a social engineering tactic to trick users into visiting this site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-hack-no-human-verification-or-survey-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-400-robux-generator_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-hacks-no-verification-2021-computer_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/100-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-bubble-gum-unlimited-candy-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-stuff-on-roblox-catalog-on-phone_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-best_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coolkid-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/open-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-promo-codes-2021-june_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-to-get-limiteds-roblox_GM431946152.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
font_00_sfnt_off000030fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FD 22384 bytes
SHA-256: 36efffe64b2bf00555d3bbe3fa1b2f947e4e9d65bde387d094fe904bf8d1e530
font_01_sfnt_off000062f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 19796 bytes
SHA-256: ad19e1b0895485c37a49fe02fea69dabec772aaf5d58694ea1046abdc2ebb73d

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