PDF malware analysis — malicious · 17a399c4fe731fdc

MALICIOUS

PDF

41.0 KB Created: 2021-05-10 16:03:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 5b744c932bc2c2c811e442b1c6dc3eeb SHA-1: d1a14e36574cccebfb2ea4f53e9194b6cc8de355 SHA-256: 17a399c4fe731fdcf4274b9c73370d89b8a75f4d87cd0c2b2b77523b623cff59

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 0.9971

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 https://netcdn.xyz/app/406889139/link-for-free-coins-in-coin-master-game-hack PDF link annotation
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-strategy_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/cm-spin-link_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/ww-roblox-come_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-roblox-clothes_GM431946152.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/coin-master-gifts_GM406889139.pdfIn PDF document text
- https://www.naizak.com/uploaded_files/userfiles/files/free-robux-cards_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
`stream_003_off000046a4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x46A4	24708 bytes
SHA-256: `a1aedd06ae9c595510376041b58a594a985dff70f0b8ef58d85a6f7556bdd503`
`font_01_sfnt_off00007f77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F77	17880 bytes
SHA-256: `2ba4049ee856ee16a7338789b9de70a28ae5aa09727d52a30852826d07af8f7c`

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