Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5f86d3fbb369a0…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 03:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: cea0fa5dc0e1ae3865ac5a1b64aefce3 SHA-1: 39f0161c6ca2ae2450936c502ab32362129765fe SHA-256: 1a5f86d3fbb369a04c202587845f2d40ef983e7903a6030fb1ee7c13dd56eb85
160 Risk Score

Malware Insights

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

This PDF file contains multiple links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The document body and embedded URLs strongly suggest a phishing attempt to trick users into visiting potentially harmful sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/431946152/get-free-robux-real-game-hack In PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/pastebin-hack-robux-2021_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-tiktok-followers-trial_GM835599320.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/stickmasterluke-100b-free-robux-obby_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-dinos-in-dino-sim-roblox_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/tiktok-free-song_GM835599320.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-have-a-jetpack-on-my-character-free-roblox_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/earn-free-robux-by-completing-offers-and-surveys_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000031eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EB 22628 bytes
SHA-256: 3d1f66f68f31c2877c417104f20ad46617d4e6785bb61afe8ff8ffb6a241e4c1
font_01_sfnt_off0000648e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648E 18896 bytes
SHA-256: 30dd1522d5e801e671b598388258c0188571e4fab575b7acf68acc33aafb6888

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