PDF malware analysis — malicious · aa792ffe090f18c7

MALICIOUS

PDF

44.8 KB Created: 2021-05-13 05:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 2dc057812efc0c84c979d19d09bafd58 SHA-1: 295a1815cbaa5f9a6c5710b3067e665ae001e07d SHA-256: aa792ffe090f18c7bb0ae5bfe265213760b8048e90809679a65732537d2e7d5c

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks or free generators. It also presents a fake CAPTCHA to trick users into interacting with the malicious links. The primary malicious action observed is the redirection to external URLs, likely to download further payloads or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/how-many-levels-are-there-in-coin-master-game-hack In PDF document text
- http://achauco.vn/public/upload/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-download_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-minecraft-server_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000489d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x489D	25408 bytes
SHA-256: `20e5d4cbdd0dcf786fd0c618e7edca1daac42a8ef46ccce16c9bd217d8e5eb40`
`font_01_sfnt_off00008317.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8317	2820 bytes
SHA-256: `96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689`
`font_02_sfnt_off00008cb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CB8	18244 bytes
SHA-256: `7a3e09ddd81ff0bf88cf020c99e068e580145ca5d489a9015f3b374a3ae3c451`

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