Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a4f99b221a4704…

MALICIOUS

PDF

46.4 KB Created: 2021-06-09 10:35:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c74a6fe28a34e4feb4395da840766253 SHA-1: 1fefc74c4abed4e829e260086000ad244d8d39a2 SHA-256: 67a4f99b221a470401b6e34bebfc72d9149432a9cedb43080d0c0d1f2ddf66de
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.tw/app/431946152/roblox-jailbreak-hack-no-virus-game-hack PDF link annotation
    • http://babbibooth.com/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/pubg-uc-transfer_GM1330123889.pdfIn PDF document text
    • http://babbibooth.com/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-gruops_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/robux-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://robuxhaxs.comIn 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_off00004ec9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EC9 24564 bytes
SHA-256: 49db38134821a1ddb13396cdde94d193218e5762e7742a013dcf942154cddf24
font_01_sfnt_off00008757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8757 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9108 18744 bytes
SHA-256: 5adf926fc343992d9418ddbdb45d7a8b27f2d2889fda26dbd3f200b06424310f

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