Malicious PDF — malware analysis report

Static analysis result for SHA-256 999c740a7ff9a4b6…

MALICIOUS

PDF

40.6 KB Created: 2021-05-19 04:11:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 105a19f980b4ba0cf4ec954fb8e4523d SHA-1: d299edcc09522e8ae0e055c0d76a3b35c6ab1ee9 SHA-256: 999c740a7ff9a4b64a5bd7e6441c736a905e3f25a8fc0c713110e1c7ec4ff822
102 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 callback-phone (TOAD) 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 0.9971

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/835599320/tiktok-free-website-game-hack PDF link annotation
    • http://www.homesweethome.pl/images/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-free-spins_GM406889139.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_003_off00004585.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4585 24440 bytes
SHA-256: 7b2f7ad50dc14d95a958f7820dfcffab526529f48dd1ebbd16bed97f509f2a87
font_01_sfnt_off00007d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 17812 bytes
SHA-256: 5ff8c618f38ac341f9cce8ee536e18ea9ffd26b9ba97f685e73b0d5242db8cec

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