PDF malware analysis — malicious · 79f0b10a788e08fa

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 10:40:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 84a575d8cb2e403064d421845febacf7 SHA-1: 8dae6befd95b9fefd984766af92771ef653babbf SHA-256: 79f0b10a788e08fa8259bb330ae65f9a96d2a6224c60c4bb65679b909b10d188

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that are disguised as game hacks and generators, aiming to trick users into downloading potentially malicious content. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly indicate a social engineering tactic. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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.co/app/479516143/wurst-115-game-hack PDF link annotation
- http://niceviaapia.com.br/images/ckfinder/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/free-things-in-the-roblox-catalog_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-roblox-robux-with-cmd_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/robloxfun-com-generator_GM431946152.pdfIn macro / runtime command snippet
- http://niceviaapia.com.br/images/ckfinder/files/coin-master-village-4_GM406889139.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/seashit-roblox-hack_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/arsenal-roblox-hack-script_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/spin-link_GM406889139.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-without-logging-in_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/paste-bin-animation-hack-script-roblox_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/roblox-top_GM431946152.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfinder/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
- http://niceviaapia.com.br/images/ckfindeIn 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_off0000302b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x302B	22152 bytes
SHA-256: `683d338ee597ffdfd83e6d5354cc5aa9cf57b18d9e9d126bff2a37e4099ecf11`
`font_01_sfnt_off00006129.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6129	18312 bytes
SHA-256: `aae8f554f9dbfa6de7f67aea7508dd29eac015a7595ddec0685b2a6423b5fdb1`

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