PDF malware analysis — malicious · a8a971b25762f737

MALICIOUS

PDF

42.3 KB Created: 2021-05-11 16:48:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 2e850f9e9da8147a61e23890aa70350f SHA-1: 4ea0cf60e3e07a88979f150232dacc16ed1e1038 SHA-256: a8a971b25762f737db550c5af33b2c6342fab6ebea6527cf6b542d9a0ef6ad52

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a game hack generator. The ML classifier strongly indicates maliciousness, and the presence of multiple links to potentially malicious domains supports this. No scripts were extracted, but the document's structure and embedded URLs are indicative of a phishing or redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/pop-slots-free-vegas-casino-slot-machine-game-coin-master-game-hack In PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-stream_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-village-3_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-facebook-page_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/easy-points-gg_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-cards_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-generator_GM431946152.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
- http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-get-a-free-dominus-in-roblox_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_003_off0000491e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x491E	25096 bytes
SHA-256: `ad83fad84dcd358d7304594cf1278c95aed4c4994c8dbe4b4993c74624dfedc4`
`font_01_sfnt_off00008167.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8167	18960 bytes
SHA-256: `1c2867144f4dcbe006f7dd1ea5adad3b4b3257689db3166d94319e477c45a36b`

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