Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb5e5d8f18e6474…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 12:53:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b809883439155b38083325bf9d5be982 SHA-1: 7249625ad874512397c1b5867e65d8b5b669bc21 SHA-256: 0fb5e5d8f18e64747d23260cabff00c65203e0c672b20504d9d8be8afa5ba8bf
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. This link, https://netcdn.online/app/479516143/tiktok-minecraft-hacks-game-hack, points to known malicious redirector infrastructure. The document's structure and embedded content suggest it is intended as a phishing attachment to deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/479516143/tiktok-minecraft-hacks-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/pubg-uc-to-pkr_GM1330123889.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.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_off0000515e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x515E 24984 bytes
SHA-256: 95ca2458bf60a43b35ae48e3ca0c0d90871731e8bf2e4fdd2a6aa06f2c07fbf9
font_01_sfnt_off000088e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E0 17880 bytes
SHA-256: df7e49ec95a548ee0d23b7b279df4e27423bf5bf6641f50b7ca94314a26af21a

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