PDF malware analysis — malicious · 73e15f0cb7ff566d

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 11:56:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: c82263653e8a1923b64a590be045a086 SHA-1: 0ac335eba639913434ed0aa529ae0e52596ea4ee SHA-256: 73e15f0cb7ff566df45b8d8c9bbf829ba275c264221e02958a2cd00564275ecb

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'hacks' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/free-coin-master-hacks-no-verification-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lure suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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/406889139/free-coin-master-hacks-no-verification-game-hack In PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-rules-cheating_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-raindrop-roblox_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/every-roblox-cheat_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/www-mobihack-roblox-hack_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-jpg_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-code-card-roblox_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-giveaway-2021_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-have-200-robux-free-robux_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/infinite-jump-hack-roblox-2021-november_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-sign-up-for-free_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/real-robux_GM431946152.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
- http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_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_002_off00003152.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3152	22828 bytes
SHA-256: `9d029063a83a2e921368e7f926460b3a2677ed77a760f74037dd1233d587e04c`
`font_01_sfnt_off00006469.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6469	18300 bytes
SHA-256: `cb2b7cb0059af51db9ca07fd0e0130e31ebff2afe995e407a7cf27ef7bb28351`

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