Malicious PDF — malware analysis report

Static analysis result for SHA-256 7089507a2103c656…

MALICIOUS

PDF

44.0 KB Created: 2021-05-12 22:44:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7710dcda3d4682b4becf274e53acd258 SHA-1: 9ffa5d0905acf700d66df380caf9e895bd38d428 SHA-256: 7089507a2103c656ba943f05aa00dc59eac2c552901e0ec7e7ab0cb6722c7031
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body and heuristics indicate a fake CAPTCHA or human verification prompt is used to trick users into interacting with these links. The embedded URLs likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-safe-game-hack In PDF document text
    • http://apx-centre.ru/images/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • https://collectrobux.coIn 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_off000049dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DD 28836 bytes
SHA-256: ed16c928ebada87aab0a19afc8d7e158a3b53f0fce42111ddb41ae1e5752f4c5
font_01_sfnt_off000089d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D2 18244 bytes
SHA-256: 393a0339ec2761f14ea9b29efa8c9c5fc9788b4979bd41a030a3ecef46023b5f

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