PDF malware analysis — malicious · 4191d24d7284351f

MALICIOUS

PDF

41.5 KB Created: 2021-05-13 11:02:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 09ad4bbfb1aebf6aa15316cbc174992a SHA-1: ca63bdceee4f2d9db0fe10154d81f81abb76eee6 SHA-256: 4191d24d7284351fa2939227d4edb96c959e533f32ec81ed8e83eef62bb399be

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 0.9971

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.xyz/app/406889139/free-spins-coins-coin-master-game-hack PDF link annotation
- https://jsgwertherborgholzhausen.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/coin-master-hack-pc_GM406889139.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
- https://jsgwertherborgholzhausen.de/images/free-minecraft-coins_GM479516143.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_off000048cf.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x48CF	24624 bytes
SHA-256: `a1a8981d3a7d58ff72df6e1f259c6aafe6950ca37ac5cdcc65fe8a1d21d32029`
`font_01_sfnt_off00008133.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8133	17884 bytes
SHA-256: `18816d8d761583b578c9833b8849e2eeaed27ef2f16a893d2032c58e3f8148b6`

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