Malicious PDF — malware analysis report

Static analysis result for SHA-256 f508253793b0e782…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 05:59:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0f532900565293a4d43498f414c98d83 SHA-1: 9a7d12128feecadc7ff6443af6a8694ba3adf7f3 SHA-256: f508253793b0e782b8303a08118aaa3fd6cbc1c3dd77c4cef697050ca8080af2
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, specifically advertising game hacks and cheats. The primary lure URL is 'https://netcdn.online/app/431946152/how-to-hack-someone-on-roblox-game-hack', which likely leads to further malicious content or exploits. The document's structure and embedded links strongly suggest a social engineering tactic to trick users into visiting malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/how-to-hack-someone-on-roblox-game-hack In PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-robux-without-human-verification_GM431946152.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
stream_004_off0000517c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517C 27096 bytes
SHA-256: 90f5fd97c21ffc21ea5f5adc6fc1f4816576c5eba781303eed9129cf78730396
font_01_sfnt_off0000908d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908D 18608 bytes
SHA-256: eebf4fd0ce8e014a693b7448b6f63c7fd528199174cddc1a90a23252bff1a633

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