PDF malware analysis — malicious · b60830f2dcbdaa82

MALICIOUS

PDF

44.5 KB Created: 2021-06-09 01:16:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 4db479de8bb2c2f5db2e17f5f4a41927 SHA-1: d4fb0b27626c6e85138b8f0c4bd2c925328d0628 SHA-256: b60830f2dcbdaa82c0997dbed83521648733b81b1093d268c2cac11e77bbbcf6

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 0.9865

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.tw/app/431946152/robux-tool-free-download-game-hack PDF link annotation
- http://www.valenciamaids.com/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-working-hack_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-face-roblox_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_004_off00004f19.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F19	25256 bytes
SHA-256: `3f9bc5038a004c91ddb5eded17341a1d5b46caaba699c7c1e9f4d587b28a6521`
`font_01_sfnt_off000089a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89A4	18824 bytes
SHA-256: `3f75b02c36008870e614646aa5d353d10526042a1129f85f926b9ef9386f1a0a`

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