PDF malware analysis — malicious · bf6dbe61dc16bbcc

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 20:42:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 5876a16c93f6dfb64ca7c4d7ce6a24e9 SHA-1: 7d8fad26fa255bfd8900039bc8deda3aa2afcbbf SHA-256: bf6dbe61dc16bbcc77568f2631e3685df2313937ac6fe27a7cfe93943ae670a3

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 0.9980

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/431946152/free-robux-com-game-hack PDF link annotation
- https://www.stylafik.in/uploaded_files/userfiles/files/medikit-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/dominus-roblox-free_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hack-de-juegos-apk-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hack-roblox-account-2021_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/daily-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/roblox-hack-website-no-download_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-roblox-stricid-codes_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/roblox-is-not-free_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/roblox-android-hack-apk_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/hacks-for-coin-master_GM406889139.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_off00002f7a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F7A	22560 bytes
SHA-256: `e0d23b65106f28e25e15ec2ed277a21107d280c6c5a4e375fd41fba2e1fbca65`
`font_01_sfnt_off000061df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61DF	18976 bytes
SHA-256: `20782bd0acfe52469dc9f14a315b4aee1c9563688044d1d6d3a516ef71528a8c`

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