Malicious PDF — malware analysis report

Static analysis result for SHA-256 829e6b69f5c9d59c…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 05:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e0fc8576d4104df3c3a9776608366340 SHA-1: 3fe5a1e75476dff6b48ab599dd8f2eb0653719bf SHA-256: 829e6b69f5c9d59cf3b526de7160d063048c3389e0833d9fea42cc5c53237e53
200 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' which redirects to a malicious URL. It also displays a fake CAPTCHA or human verification prompt to trick users into interacting with the document. The embedded URLs are likely used to download and execute a second-stage payload.

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/431946152/get-free-robux-no-human-verification-game-hack In PDF document text
    • http://getthelook-bkk.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://getthelook-bkk.com/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://getthelook-bkk.com/images/robux-in_GM431946152.pdfIn PDF document text
    • http://getthelook-bkk.com/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://getthelook-bkk.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://getthelook-bkk.com/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://getthelook-bkk.com/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://getthelook-bkk.com/images/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://getthelook-bkk.com/images/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://getthelook-bkk.com/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://getthelook-bkk.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://getthelook-bkk.com/images/roblox-people-girl_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_off00004928.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4928 25416 bytes
SHA-256: 30ee931afab24775467dce97c7a2fa1dd2f368ac69de696f4ddf57b82cc51f9e
font_01_sfnt_off000082cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CC 18860 bytes
SHA-256: 77094cb8e4b41d81131149df95963a95cd1356d500cc75fcdf894a2f9afc6be7

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