PDF malware analysis — malicious · d1437eb1c92fee9d

MALICIOUS

PDF

43.1 KB Created: 2021-05-10 22:04:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: a0c3084b82606fcc90fed42839de7cd5 SHA-1: 899e1fd1ce51b55536286ac64a1889d47d6a660b SHA-256: d1437eb1c92fee9d0fb7be860fe2f0d9476cda06a8b94fa4a6050fd0dd526be2

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/431946152/free-robux-images-game-hack PDF link annotation
- https://www.cow-style.com.tw/upload/files/free-roblox-injector_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-free-wings_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-links-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coins-master-hack_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/make-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-avatar-com_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_off0000492b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x492B	25556 bytes
SHA-256: `69368b7554bfbbd77168d6bc513127bda4eae64e13dac84634fcedb1d8845ba8`
`font_01_sfnt_off0000849c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x849C	18792 bytes
SHA-256: `a2580c58451f3b1d88c8ceab1016c43f7244c9e681afad5968b7c22bbe0132ae`

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