PDF malware analysis — malicious · 4f9736c3bf204150

MALICIOUS

PDF

46.5 KB Created: 2021-05-15 02:35:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 4d2eba721c30bc570c00607f5f3dd8d1 SHA-1: 3bfdb66522c6b6a3af692e06b1859f52ec15fe17 SHA-256: 4f9736c3bf204150f277e9b5e086f8b2cf4dbcb13e44eeeaa207f2992537a40c

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links designed to lure users into clicking on 'free Robux' or 'game hack' related content. These links redirect to malicious infrastructure, including a known redirector, suggesting an attempt to exploit user interest for malicious purposes. The presence of multiple PDF links and a malicious redirector indicates a phishing or scam attempt, likely leading to further malware download or exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 5

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.
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.
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/431946152/free-robux-without-verification-game-hack In PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/robux-download_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/download-coin-master-hack-mod-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_off00004ef8.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4EF8	29512 bytes
SHA-256: `8350e65a5bff49200dd5b0f81f7c3f44ae160eec0d4c63d2c0e79d3f75ff7e76`
`font_01_sfnt_off000091ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91AB	18964 bytes
SHA-256: `5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef`

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