Malicious PDF — malware analysis report

Static analysis result for SHA-256 166078e687b567b9…

MALICIOUS

PDF

46.4 KB Created: 2021-05-14 21:00:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ee8c6f3dc3fd873d3367c258ecaf837d SHA-1: 92fd684aaf4a4dc6f510fdedd7a73f0dbccf3065 SHA-256: 166078e687b567b901edae2d3f0e8aee9b5444dbcd0d9d340a08ab19cce18056
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 0.8696

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.xyz/app/479516143/minecraft-launcher-free-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/com-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn 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_003_off00004b84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B84 28200 bytes
SHA-256: 2fbfb8ecc0314cfd2eae4ad8219a809c2d7837a9c838de28d0ada484e3c4d618
font_01_sfnt_off00008a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8B 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off0000944a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944A 17872 bytes
SHA-256: d837b145e961d25029e35f3a46fce907c35d402980f977a4958a38d6468d5501

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