Malicious PDF — malware analysis report

Static analysis result for SHA-256 995557c2cc190487…

MALICIOUS

PDF

226.6 KB Created: 2021-07-05 11:24:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e301fc2c4a0ca2d9a285597407a6697d SHA-1: 15b041dab46ff8732b61b0cb9ed813df6dd5f9d3 SHA-256: 995557c2cc190487a57dd5ab23cc736f15cafa78fa4a055f3077e008bf9d1bc7
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple high-severity heuristics indicating social engineering lures. It presents a fake CAPTCHA and promises game hacks, which is a common tactic to trick users into clicking malicious links. The embedded URL 'http://netcdn.tw/app/1094591345/pokemon-go-free-leafeon-game-hack' is likely a redirector to a phishing site or a download for a malicious payload. The document's content and heuristics strongly suggest an attempt to exploit user curiosity for malicious purposes.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://netcdn.tw/app/1094591345/pokemon-go-free-leafeon-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/lemonade-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/robux-hack-by-villarnor-gelerb-pastebin_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-cards-generator-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-250-million-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-and-tix-generator-no-survey-or-download_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/como-ser-hacker-en-roblox-atravesar-paredes_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/impact-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-hack-roblox-accounts-2021-april_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/trigon-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-any-item-in-roblox-without-hacking-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-jailbreak-free-money-march-2021_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_023_off00032000.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32000 25576 bytes
SHA-256: 4ca91d63aa6362135bb43a71b07533fd173a8beb27ef0e5407a1d448baf15d6e
font_01_sfnt_off00035bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35BFB 18360 bytes
SHA-256: 853b150481450a387757cdce605568e718b0c8edfde99b4cc76fdd6d1c0c2a7b

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