PDF malware analysis — malicious · 17a427cd4d8f7ad4

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 03:50:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: bc81d62b330331c9ca1a19e6970122f7 SHA-1: d1b8ad2288cc594fe7a915c1df868ad598da7084 SHA-256: 17a427cd4d8f7ad439b725ae54b421356de2fbd44a615fe9fbbd99f9ee606596

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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-legit-game-hack In PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/is-there-actually-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/getrobux-now_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/win-free-robux_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/links-hack-30-robux-adfly_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/free-minecraft-client_GM479516143.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/free-minecraft-com_GM479516143.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/free-roblox-accounts-with-obc-2021_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/dbz-final-stand-roblox-cheats_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-attack-on-titan-cheats_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-com-hack_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-hack-org_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/roblox-gang-rape_GM431946152.pdfIn PDF document text
- https://www.alamrayabali.com/assets/CKImages/files/free-robux-openrewards_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_off00002fa3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FA3	22260 bytes
SHA-256: `5f95f78d5f427c7ff3d1fad141df7ed6f9013b2588e42b77bb30886cc0fa8200`
`font_01_sfnt_off00006158.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6158	18940 bytes
SHA-256: `794d8ecd233df1702e9bde6a16c5f654292374bf49d8c1531efb1b5eb25ac7e0`

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