Malicious PDF — malware analysis report

Static analysis result for SHA-256 1beb7ec3c94b2b52…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 04:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e360837e9f7e5372cd574dd66dfcee33 SHA-1: a864a492a978452332963ed769555c70bfa6e288 SHA-256: 1beb7ec3c94b2b52866d3bcaf04c33b5e126ae74d197d0df7faa6f0114722393
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • 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
  • 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 https://netcdn.online/app/431946152/free-and-safe-robux-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/apps-that-give-you-free-robux_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
stream_004_off0000517f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517F 25344 bytes
SHA-256: e73f6c74bfe70dab1802a0f8ecec7513316a4da28e2f59501df7b15c234de07b
font_01_sfnt_off00008bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB1 18416 bytes
SHA-256: 8206d06b339a651c7e24dc5e59f6ac9b249a236e81a71e0f73348fded5a30edc

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