PDF malware analysis — malicious · f21323a48da285c5

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 09:24:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 431a0123763c24225ca8238451da3694 SHA-1: 16a3d0b6a24491dc14a21e01d21e202e41351aac SHA-256: f21323a48da285c5bac314cba112823dd28dbe97ec91984eb6136bd4381e5563

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 4

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.
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.tw/app/406889139/coin-master-free-gifts-game-hack PDF link annotation
- http://www.sourceit.llc/uploaded_files/userfiles/files/free-robux-inspect-element-codes_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/roblox-free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/free-roblox-card-numbers_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/roblox-group-favorite-follow-bot-free_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/counter-roblox-hacked_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-ipad-2021_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/free-roblox-codes-that-havent-been-used_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/roblox-cheating-hacking_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/free-robux-codes-october-2021_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/roblox-free-items-thubnail_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/hacks-for-roblox-on-mobile_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/how-to-hack-roblox-to-grt-robux-the-easy-way_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/free-robux-no-offers-no-verification_GM431946152.pdfIn PDF document text
- http://www.sourceit.llc/uploaded_files/userfiles/files/how-to-hack-peoples-roblox-accounts_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_off00003091.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3091	22896 bytes
SHA-256: `fb6ca1382513b947d8a93cdec06e759b7f07d3a756b99b3f52cb6886aa72289d`
`font_01_sfnt_off000063c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63C4	17996 bytes
SHA-256: `0554876b2ab95b57b2a8903cbabfbfa90e4f9f04422ab63317bc25d957b52972`

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