PDF malware analysis — malicious · ef3784396b49c825

MALICIOUS

PDF

35.3 KB Created: 2021-07-08 01:36:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 66c5d097c010bcdef8ef81364a946f0f SHA-1: e037ed28db28ba47a84b191c72ec29146e18f771 SHA-256: ef3784396b49c825621a9d823225eb93cc3e917fb2e9e67a11bddcb21b7567b1

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a lure for game hacks. The document body text also contains similar lures and embedded URLs, suggesting a phishing or scam attempt. The primary goal appears to be redirecting the user to a malicious site that likely hosts further malware or exploits.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/get-free-spins-coin-master-2021-game-hack PDF link annotation
- http://www.donjastubica.hr/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
- http://www.donjastubica.hr/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-free-robux-clothes_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-speed-boats-free_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/hack-robux_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/auto-clicker-download-roblox-bloxburg-free_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-vip-roblox_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/best-ways-to-make-robux-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/my-roblox-group-got-hacked_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_off0000323c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x323C	23212 bytes
SHA-256: `c132e9520649f3f8e5ddfd9a7623f1a55156d762db3c391f6fe6f9821b848f48`
`font_01_sfnt_off00006686.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6686	18576 bytes
SHA-256: `47068641d4cd5afad495b2744cbb78709b2a1d88425159384b1e35df59296f67`

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