PDF malware analysis — malicious · c93d897dba2c06f4

MALICIOUS

PDF

57.8 KB Created: 2021-06-03 12:01:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 19f4942541344fc02498d886e963ac54 SHA-1: 2a627fe8ae849f32301cf2ff8bb1ce47aa5bc46c SHA-256: c93d897dba2c06f44f298643b577cde2d7ece340dd5df3bb655f4d1acb55950b

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9612

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.online/app/406889139/coin-master-hack-ios-cydia-game-hack PDF link annotation
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/can-pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
- https://ifef.es/ckfinder/userfiles/files/master-coins-free_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000534e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x534E	28496 bytes
SHA-256: `46723805f13da205164b3aacf28b9359492d2e645554cc7b78a4c98a668ae9e7`
`font_01_sfnt_off0000934e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x934E	3088 bytes
SHA-256: `e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222`
`font_02_sfnt_off00009e19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E19	7960 bytes
SHA-256: `cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2`
`font_03_sfnt_off0000b13e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB13E	18072 bytes
SHA-256: `2d204714e7ecc0ada3d20692b14752d7a228914fcb1cb1d03a14579bf96f2857`
`font_04_sfnt_off0000d2c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2C0	4272 bytes
SHA-256: `fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0`

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