Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8ce04af8f0f91c…

MALICIOUS

PDF

49.3 KB Created: 2021-06-09 08:36:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 02b2ccdbd88002c2392effa2936964dd SHA-1: 481f1cf27d1426d8c4cef4f5266350b8e233760d SHA-256: fb8ce04af8f0f91c52460a7799279f08f97b05cddde5bbbb8c45b53e6c965e30
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to a known malicious redirector, disguised as a 'game hack' or 'free generator' lure. The document body and embedded URLs suggest the intent is to direct users to potentially malicious websites, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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-get-roblox-for-free-on-pc-game-hack In PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/irobuxcom-get-free-robux_GM431946152.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_off0000574f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x574F 26604 bytes
SHA-256: 554d4d01e2dc475d80db414e7b75c122a2054919824dba52934b36e90c689986
font_01_sfnt_off000093fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FD 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00009db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB4 18372 bytes
SHA-256: dbc9bdc8b330f284d7b4a79ab12523a8931812aafc4a5e632a9b5c9f8e2ae9df

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