PDF malware analysis — malicious · 3213b64747deddca

MALICIOUS

PDF

47.4 KB Created: 2021-05-10 23:37:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22

MD5: beda205135010043cdf22df4423fb8ca SHA-1: f6cf8b1ebda3d13d33134506ab72194ec12a0194 SHA-256: 3213b64747deddca43e1fa709c64f845ef09021155c271fb4628a797530fcbbf

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure for game hacks, indicating a phishing or scam attempt. The embedded PDF artifact also contains suspicious links, suggesting a multi-stage lure. The primary malicious URL identified is https://netcdn.xyz/app/406889139/hack-coin-master-2021-game-hack, which is likely the final destination for the scam.

Machine Learning

Nyx PDF Classifier malicious score 0.9560

Heuristics 6

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.
Secondary embedded PDF body has suspicious static findings high POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
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
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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/hack-coin-master-2021-game-hack PDF link annotation
- http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-app-real_GM431946152.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-server-hack_GM406889139.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/give-me-robux-now_GM431946152.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- https://mtsn31jkt.com/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://mtsn31jkt.com/__statics/gudangsoal/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/roblox-devil_GM431946152.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
- http://mtsn31jkt.com/__statics/gudangsoal/files/roblox-gang_GM431946152.pdfIn PDF document text
- https://mtsn31jkt.com/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000535e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x535E	25608 bytes
SHA-256: `79ef7364fac6219800b0a4ef72221dfc043d6fa3d79e618f51794944441c6d87`
`font_01_sfnt_off00008db2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DB2	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00009764.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9764	18116 bytes
SHA-256: `a3df71077179c7440b1e4836f0868e786a4fbdd8e53d65e7c5dca2578e10a822`
`polyglot_child_pdf_off000009f6.pdf`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x9F6	46026 bytes
SHA-256: `fffe18b124b984ba9dee42949e08d6ae8835e052db5b65942250c5daa5582d0b`

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