PDF malware analysis — malicious · fa661a54a800bfa0

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 08:19:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: e43035c4c5a60a9ab7a86d1f73919d75 SHA-1: 78e66cea2cf4f8a4b201cfb3f5358994664eb0ab SHA-256: fa661a54a800bfa015c018a822d296798a57274bf09b018a01da58f823d504aa

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-computer-game-hack. These links are presented as lures for game hacks or generators, aiming to trick users into downloading further malicious content. The document body and heuristics strongly suggest a social engineering tactic to facilitate the download of a second-stage payload.

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/479516143/how-to-get-minecraft-for-free-on-computer-game-hack In PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/roblox-studio-20-beta-download-free_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/roblox-pilot-training-flight-simulator-hack-script_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/clone-army-free-roblox_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/roblox-hack-avoir-de-largent-facilement-sur-jailbreak_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-fnaf-shirt-roblox_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/robux-gainer_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/robux-free-website_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/black-curls-hair-extension-roblox-free_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/roblox-free-script-executor-2021_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/roblox-money-hack-robux_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/robuxglobalcom_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/www-hacker-com-roblox_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-roblox-robux-generator-activation-code_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/new-roblox-cheats_GM431946152.pdfIn PDF document text
- https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/give-me-robux-now_GM431946152.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00003121.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3121	21352 bytes
SHA-256: `ecfdb5aee7e1d74075b3c441b5122e862576486a4f7d8c6ca5ae6c8ee39f9e41`
`font_01_sfnt_off00005f95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F95	18736 bytes
SHA-256: `17f0bfc7da489febe2cf31a01e732b59c776963868fc2712bfb7438877b5a354`

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