PDF malware analysis — malicious · 7597bbb80af6855d

MALICIOUS

PDF

35.6 KB Created: 2021-06-24 02:59:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 562858680c5e2648222b693fa4f3972b SHA-1: efd8a69be5f8ad5556f8fb27865613ce3aef642e SHA-256: 7597bbb80af6855d62eac811072f7eb8449fa97d462623ecfb0128575721e0c5

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.co/app/406889139/daily-free-spins-on-coin-master-game-hack PDF link annotation
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-account_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/krnl-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-rewards_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/tiktok-free-views_GM835599320.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-hack-phantom-forces-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-link_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-stuff-in-roblox-working-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-offer-wall_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/como-usar-cheat-engine-67-no-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-coin-master-spins-daily_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
`stream_002_off0000347f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x347F	22792 bytes
SHA-256: `6f01425784f433a558c5560ee0876acab9d9009d29501d21eba6740ba5d33895`
`font_01_sfnt_off000067b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67B0	18596 bytes
SHA-256: `aa492e242eac48f7948a24bc45da02f981899f459ecbb02c793d9ace75e48389`

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