Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d0dfe496bac449…

MALICIOUS

PDF

42.3 KB Created: 2021-05-10 23:00:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f9958ec97d9c84a3c7544ed8ee3c6088 SHA-1: 21c34f0908d424d7a41579943dc09e1bdc514b21 SHA-256: f7d0dfe496bac449337e5e4e2709b4444144c3985b80e619fae8826e5290204f
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The document body and embedded links suggest a lure to trick users into downloading potentially malicious files or visiting compromised sites. The presence of a fake CAPTCHA heuristic further supports the intent to deceive users into performing an action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/hack-coin-master-download-game-hack In PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/get-free-robux-generator_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_003_off000049fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FA 24720 bytes
SHA-256: c0707d4a605e96f473f4f17ee05e75e5f0586b39a34e06ec913f88522953d973
font_01_sfnt_off000082c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C8 18296 bytes
SHA-256: 5719de20b3226af2bdcbf6ff002d7cecdad7590bfdf105e8aa16a01d29572d54

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