Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d5734361b71d59…

MALICIOUS

PDF

47.7 KB Created: 2021-05-19 13:14:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 474b053411aa93425e7a22bf1d3e50ba SHA-1: 808ea4fc42fe12e4ee64cf8eb72290a5a2862369 SHA-256: 76d5734361b71d594ae4e8efc132efa76aa5177247919c7a268d99385170862c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple links impersonating brands and promising game hacks, which is a common lure for credential phishing and malware distribution. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-hack-roblox-accounts-on-phone-2021-game-hack.
  • 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) 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-hack-roblox-accounts-on-phone-2021-game-hack PDF link annotation
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/roblox36com-free-robux_GM431946152.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
stream_003_off00004d48.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D48 25876 bytes
SHA-256: 06c371acabffbf2710869d00c7c702a2637f359d0a34609dc5fbb77635bc7a6b
font_01_sfnt_off000087ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87EF 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9501 19312 bytes
SHA-256: ee3ccdf346fecf17211ec9caf874d857695d657b5f92e2b1f0fe00576c016ffb

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