Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f07c8a47f2f73ea…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 08:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3c07f81aa0852f6feda755c89cf92e32 SHA-1: e1380c52f06bcb986a16575059951a990234c5f0 SHA-256: 9f07c8a47f2f73eaa44249e4c5c1afc30a6be27d044fde9e8a381381a6a8c3eb
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 0.9748

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/easy-robux-com-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-folowers-75_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ea7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA7 25120 bytes
SHA-256: 19d750d3b503580bbe1701251a2027382bd0548a1e4a91f4390e42905a571d0e
font_01_sfnt_off000087b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B7 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000916a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916A 18516 bytes
SHA-256: 36708b749d2f425dc7cde5eb6959611b00d5eb9a0badae66bda6d86ebb31f598

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