Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0c5b6038a17907…

MALICIOUS

PDF

46.3 KB Created: 2021-05-11 08:09:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0b15bd069524bf53b3067a14ba2038ac SHA-1: f71a98deb160a3d88d12589571b23c2c228b12ab SHA-256: dd0c5b6038a17907e5b54ade82bb35e7517f43e715243c016f366817629fdfa2
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hack generators. The document body and embedded links suggest a lure to trick users into visiting potentially harmful websites. The presence of a fake CAPTCHA heuristic further supports the intent to deceive users into performing an action, likely to download a secondary payload or engage with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/unlimited-spin-coin-master-hack-game-hack In PDF document text
    • https://ibelive.com.tw/image/data/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/hack-master-coin_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-hack_GM431946152.pdfIn 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_off000049cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CD 26532 bytes
SHA-256: 22bb2dc520e3dc06d2cf9d4cb575a0b9492e3f210fe2677a1a8b1ec41d552eea
font_01_sfnt_off000086b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B3 3172 bytes
SHA-256: 378febc879bd123de6a13c0217bc46c2d9fc71ef32addee5c7301698f60b0d4b
font_02_sfnt_off000091c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C4 18584 bytes
SHA-256: ae98b113e243a6dee09af4228d4dcf65a32797416eb214c6eaedfd928d742d84

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