PDF malware analysis — malicious · ebf69f1a82d6ad2f

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 08:40:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 3ec11bc0ae9ddccb63eeda737cb71898 SHA-1: 5e9104332da27279f7fa71cf2409719ae59577d5 SHA-256: ebf69f1a82d6ad2fffc05d754b8529c2d8d85da13880f4c643f0cdc257341794

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious URL, masquerading as a 'free Robux generator'. The document body and heuristics indicate a lure for game-related cheats, likely to deliver a second-stage payload or phish for credentials. The presence of embedded URLs and the redirection to known malicious infrastructure strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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/431946152/free-robux-generator-2021-no-survey-game-hack In PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-freebies-com-hack_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/money-cheats-roblox-cmd_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-gfames-that-dont-take-password_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/ciris-roblox-hack_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-pin-codes-free_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-no-human-verification-and-no-offers_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-inferno-box-in-miners-heaven-roblox_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/groups-that-give-you-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/robux-for-free-generator_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
- https://stain-madina.ac.id/assets/ckfindIn macro / runtime command snippet
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00003098.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3098	21936 bytes
SHA-256: `789f9dc314237642626de86a193c729c7c588d13cd29b761f24374ff92d6e64b`
`font_01_sfnt_off0000610b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x610B	19516 bytes
SHA-256: `215bbe1509df05bb6592a2eb23184ac9fd1abeffda7f861746e5b701ad597e03`

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