Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcbccc2e7533007…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 09:42:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a6a6aef078feaa4de1e1d0ea60fa187f SHA-1: 9a849079e644eeb81135fb4c640f28627f9e68c9 SHA-256: 3bcbccc2e75330075a1ca39f4eaa1f34e380b0ec1bb4c53415aeef658c77aa6f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and game hack lures, indicating a social engineering attempt to trick users into downloading further malicious content. The ML classifier strongly supports the malicious nature of this PDF. The presence of embedded URLs and the document body content, which mentions 'game hack' and 'free generator', align with a phishing or scamming attack pattern.

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/how-to-hack-coin-master-root-game-hack In PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-on-a-phone_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/free-games-to-play-roblox_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/how-to-hack-in-roblox-2021-may_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/roblox-hack-fliight_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/tiktok-free-crowncom_GM835599320.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/roblox-skywars-fly-hack-2021_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/roblox-jailbreak-fire-truck-hack_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/corrupt-free-roblox-torso_GM431946152.pdfIn PDF document text
    • https://learningma.alkautsarkrw.web.id/__statics/gudangsoal/files/memez-hack-roblox_GM431946152.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_off0000334c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334C 23044 bytes
SHA-256: b588a0a376837f4eb67bb4cf76f6f52c72573bec38af9764e460e5dfb58478cb
font_01_sfnt_off00006708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6708 18168 bytes
SHA-256: b084d0e2e86f47cdd64d82d1d6e6bdcefc655448caf01d999206dcd8136a3bd2

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