Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d70ad2ff57c3a3…

MALICIOUS

PDF

46.1 KB Created: 2021-06-08 21:53:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1ca576930abcdf59bb52289869781208 SHA-1: a6aca5f2934e40f776c155389d8a5804c6874faa SHA-256: 37d70ad2ff57c3a358c16057f3221e43b2d6226fda15d4e94af459a3bb8e9103
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into interacting with a malicious link. The embedded URL leads to a redirector infrastructure known for hosting malicious content, likely to deliver a second-stage payload. The document's content and heuristics strongly suggest a phishing or scam attempt designed to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-robux-on-android-without-human-verification-game-hack In PDF document text
    • http://precisionheavyhaul.com/images/codes-for-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/rbx-sites_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/roblox-strucid-aimbot-hack-download_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/scripte-free-robux_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/how-to-get-free-spins-on-coin-master-game_GM406889139.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
font_00_sfnt_off0000534d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x534D 25376 bytes
SHA-256: 68818b695a35a049a3ab4d302051a0c7fc9089f9b5f771a68ef36839c8250e0d
font_01_sfnt_off00008e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E13 19564 bytes
SHA-256: 4fbaf9c832399053a13d80ffcb78d81349eed7d1171460444a01e1c51887a188

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