Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e000db0d0575b4…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 10:59:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cd13284198fee1119a3ade08e31bb315 SHA-1: f924d281ee03f58805515dc9ddd28f165b6e302c SHA-256: 07e000db0d0575b451c82cb7b7f8c9df95a2dd9852eeb166c17329dcc87619fe
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, disguised as game hacks and generators. The primary lure is 'Free Spins And Coins On Coin Master' which redirects to http://netcdn.tw/app/406889139/free-spins-and-coins-on-coin-master-game-hack. This infrastructure likely serves as a gateway to further malicious content or exploits. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly indicate a malicious intent to redirect users to potentially harmful sites.

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.tw/app/406889139/free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-make-a-free-shirt-on-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-super-power-training-simulator-cheats_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/tower-of-hell-roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/wwwfree-robuxcom-free-robux-now_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/real-robux-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/wild-savanah-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/cheat-codes-for-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-money-hack-jailbreak-download_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.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
font_00_sfnt_off0000312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312D 22616 bytes
SHA-256: a4fb21736cc74718b429c0aaf1078d0d31b48d5cdb21ad018a0b938151aaa476
font_01_sfnt_off00006363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6363 18348 bytes
SHA-256: 99aa2d2b2e9c114759ac0d3175951e1a7ccd7b87db14ea3fc4aa40a1608bcbe0

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