Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dfe30f99522038f…

MALICIOUS

PDF

46.1 KB Created: 2021-05-17 04:32:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 03ab7a69dc0512c77bd8156e187f2c5f SHA-1: 13944305e23b82edd1a2421874a90d33e3d439fe SHA-256: 4dfe30f99522038f5aa1748e4c7fa50202a7e67e4110fba78a2ca0be9a0e7ab8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA and a download button lure to trick users into visiting a malicious redirector. The primary URL leads to a site offering game hacks and free currency, a common pretext for distributing malware. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9216

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/431946152/youtube-how-to-get-free-robux-game-hack In PDF document text
    • http://cablelinkcoms.com.au/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://cablelinkcoms.com.au/images/hack-para-coin-master-sin-verification_GM406889139.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
font_00_sfnt_off000048c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C1 24808 bytes
SHA-256: db5ea9ea5981fc0698f192b2f7517533fdfa55599b9af5c9d3b218293280157a
font_01_sfnt_off00008134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00008e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E46 19324 bytes
SHA-256: 8cc22f956e991ed71cff23cb8e204466590b02716b7636b7441d5bf394431f14

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