PDF malware analysis — malicious · 96f583f17bd99eeb

MALICIOUS

PDF

44.0 KB Created: 2021-05-12 05:30:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 2f0d581a84eb3637c3b146b49e032fa0 SHA-1: 3295f5685d655ff81a30aa4af9dfdb68142cf5a6 SHA-256: 96f583f17bd99eeb2624caa4a5a46c7191594b4b92cb8b5254b6a84dd145b8af

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 0.9969

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/431946152/free-robux-2021-no-verification-game-hack PDF link annotation
- https://www.devries-group.de/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/roblox-com-hack_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/i-robux_GM431946152.pdfIn PDF document text
- https://www.devries-group.de/images/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/coinmaster-twitter_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/coin-master-free-shield_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/master-coin-hack-app_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
- https://www.devries-group.de/images/daily-coin-master-free-spin-apk_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_003_off0000498f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x498F	26680 bytes
SHA-256: `921056f61e01d50baee6b261c650d9fecc1f76bbb3895fd876a3080ae3459f96`
`font_01_sfnt_off00008789.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8789	19004 bytes
SHA-256: `66494d2150ad1cf2ec2ec7771a558690eaf6f54b49f1e3390ebbe78937767b49`

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