Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead16aa318d9480d…

MALICIOUS

PDF

35.6 KB Created: 2021-07-19 17:11:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7bd21aaa2c531d8420ed4ca5acdb443d SHA-1: 35624337a46bbcd0ddb20c01ae5704fb991a1f13 SHA-256: ead16aa318d9480d54aaf8627a3f591a5d889ed304c940a10d1461aba6661d9f
180 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'generators' for popular games. The document body explicitly mentions 'I Got Hacked On Roblox' and includes a call to action for a 'Robux Generator', indicating a social engineering lure. The presence of these links and the lure strongly suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or malware delivery.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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 http://netcdn.tw/app/431946152/i-got-hacked-on-roblox-game-hack In PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34DF 22800 bytes
SHA-256: 92e1374bd5c22e8806ad6734f062351df70259d17da45b123d2e6f8439d7d18d
font_01_sfnt_off000067ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 18644 bytes
SHA-256: f44e9b3fb0d0f15266976d4518c0289fb567cec7e33ee43e4a4ea879cf7855b4

Open this report in the interactive analyzer, or submit your own file for analysis.