Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4fa8581cc63b2f…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 09:02:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: aabad34a1dbf130118bacf2521045bf1 SHA-1: aa964ed1d50b561bd3e7c5c30fcad22d54667927 SHA-256: 3f4fa8581cc63b2f9ae736b663aa2f72c36722ef1119913cd0ce2a7f3aaaa04c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency or hacks, directing users to a known malicious redirector. The embedded URL, https://netcdn.online/app/431946152/get-free-robux-without-human-verification-game-hack, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a social engineering attack aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/get-free-robux-without-human-verification-game-hack In PDF document text
    • https://i-photo7.com/image/data/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/rewardrobux-com_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/install-coin-master_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.micIn 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_off000050ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50AD 26176 bytes
SHA-256: 6eb02d199c98bc43ffa1b8c17113383c932a4eb2d72df0df26143e11f8e8c805
font_01_sfnt_off00008d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D12 19224 bytes
SHA-256: d26e558c8d9f3aa3a60cf99b5f2b698b808b007009279a89da7a3b2992804aa3

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