Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae4ad4acafbbf9d…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 10:01:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4b4944bef8d513bfa1d824fe35ca1c4a SHA-1: 9012864bc36fac29a9beea170a8c1005d4021ffd SHA-256: 9ae4ad4acafbbf9d40ca21245e336f2dbdda5c4e26bcf6b322aa8b40ae30f6b9
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'game hacks' and 'free generators'. The document body, though heavily obfuscated, contains references to these lures. The primary goal appears to be directing users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/minecraft-server-hacks-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/robux-offers_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-foxy-food-coin-master_GM406889139.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
stream_004_off00005099.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5099 27124 bytes
SHA-256: 606444c540a2c5e177f564b82571771588273f7c54d8795cf59187039dfc0dd7
font_01_sfnt_off00008df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF4 17852 bytes
SHA-256: d08e9f99218473ecffc4f3e4fddc043c571e48cf04331ee5ff23a4dc6866f563

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