Malicious PDF — malware analysis report

Static analysis result for SHA-256 5870318a908c4e3b…

MALICIOUS

PDF

47.6 KB Created: 2021-06-08 23:18:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 305dc82d8f036538fc146c9f080aa470 SHA-1: 7f39932280f30127fcff95457df028ec692a0839 SHA-256: 5870318a908c4e3b17bb450b2a6e643b9e616e6ad03dd9a42b0427a64d4ff425
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, that promise game hacks and free currency. These links likely lead to further malicious content or phishing pages. The presence of a visual download button and the overall lure suggest an attempt to trick the user into downloading a payload or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/431946152/how-to-cheat-to-get-robux-on-roblox-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/claim-robux_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-2021-no-fake_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000520a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520A 25140 bytes
SHA-256: 58427724b66c6d61f616e1c1053f2102c72c3c305a62f097d250a1f340bc1d5b
font_01_sfnt_off00008bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFA 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9609 18584 bytes
SHA-256: 26a1feb848026b2e47ed38f403bbf3a8a57c52f63e767e47f2180dc5b6b17809

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