Malicious PDF — malware analysis report

Static analysis result for SHA-256 39494dd6da1ff845…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 17:31:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 15b7a6b05dc04d1f074473743e3f0da9 SHA-1: 3dd45099a22720e8ae856a3e9bdfff82a763d3c2 SHA-256: 39494dd6da1ff8450dae842097e23db95e18bd447499a3e1f62bea9999a02f8a
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'generators' for popular games like Roblox and Coin Master. The primary lure appears to be a 'Roblox Spin Hack' leading to the URL http://netcdn.co/app/431946152/roblox-spin-hack-game-hack. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting these malicious sites, likely to download further malware or engage in scams. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

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/roblox-spin-hack-game-hack In PDF document text
    • https://sensorcamera-tw.com/upload/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/update-how-to-get-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/riot-police-roblox-free_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-assassin-cheat-codes_GM431946152.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
font_00_sfnt_off0000316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316F 22924 bytes
SHA-256: f106e053f31497610b6727aac35b9d9a86919810261b973a3618daac7b56ab23
font_01_sfnt_off000064c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C5 18952 bytes
SHA-256: 8a6d55d5b580fdd92072b0b688892773a23ed1cc5304719b366a7abf3bb57e3b

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