Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a83ccfdfbab8b1…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 23:42:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f7a33cc89b2a5cdf3cca253db716ae8f SHA-1: 0b9044b73206f54930887ab1f81501c970a9f9f5 SHA-256: 70a83ccfdfbab8b1459039d9140146cf98cfe9440458851e4bd46a84b03c29de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' for the game Roblox. The document body and heuristics confirm the intent is to lure users to these malicious URLs, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/how-to-hack-roblox-to-get-free-robux-easy-game-hack In PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/hack-de-robux-100-real_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/tiktok-free-80_GM835599320.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-ss-executor-free_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/do-roblox-admins-get-free-builders-club_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/roblox-dragonball-rage-cheats_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.lifegoeson.in/uploaded_files/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off00003167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3167 21744 bytes
SHA-256: 5a15546196556497f746496aa3588d81d8c5c5bf215bbd8b25675518fb01e6f3
font_01_sfnt_off00006140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6140 19408 bytes
SHA-256: 5ea0c83895f7b66403316b2bf08579f9f64065fd9e9c9f68bfaffa2b4af12ba3

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