Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc50deb19ae38bf…

MALICIOUS

PDF

35.3 KB Created: 2021-06-19 04:04:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 21b0484c3573d39eab34f67c8b69ab2a SHA-1: ad3e69a104b45973525ff04f5191add30a9fc578 SHA-256: 9bc50deb19ae38bf90f16759e362df76eb0bd75b5a180d89f781455a88d2f63b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a 'free generator' or 'game hack' for popular games like Roblox. It contains multiple embedded URLs that redirect to malicious infrastructure, specifically http://netcdn.co/app/431946152/roblox-free-objet-game-hack, which is flagged as a malicious redirector. The document's content and the presence of malicious redirector links strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

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.co/app/431946152/roblox-free-objet-game-hack In PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-rublus-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/safe-free-robux-generstor_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/hacks-for-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-nation-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-daily-links_GM406889139.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_002_off0000321f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321F 22788 bytes
SHA-256: 8399b6f2fefc9b9e543c999ac18fa53f9fcf10527e9d3b12e865c9469f658316
font_01_sfnt_off0000652c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 18944 bytes
SHA-256: b3ba9cddadfa9dcef2f006dc6d8e5e72a939a24adade22ab9a38930c52639710

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