Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b83b43310128ce5…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 12:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 99ebca4ec8dfd24bd38ce9db17f04164 SHA-1: 48d479eb975b128003cb7827c8c1aa608bf3a227 SHA-256: 1b83b43310128ce50677b5b675552c6361b242ce505a666d4e219dadf50befc4
200 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' which links to known malicious redirector infrastructure. The document also instructs the user to copy and paste content into a shell, indicating an attempt to trick the user into executing commands. While no scripts were explicitly extracted, the nature of the lure and the presence of embedded URLs suggest a potential for further payload delivery or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/win-free-robux-game-hack In PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-uc-and-bp-in-pubg_GM1330123889.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-tool-exe_GM406889139.pdfIn 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
stream_004_off000053ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53EA 25476 bytes
SHA-256: 661517521669627c9c78a431bb22ed400208686324904ee86a023a1d06eb2d8f
font_01_sfnt_off00008f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F17 18332 bytes
SHA-256: abf0b8ed31f5047ebf3c1463738251345f2a3e8ea43e3f17fb5c5b26bb0b5a7e

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