PDF malware analysis — malicious · 6d51b52bda86b971

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 07:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: dfbb961439c3789cacc709ed644fd46b SHA-1: 8fd65608cfc05acf152ebab30da905009722b86a SHA-256: 6d51b52bda86b971cdd7faaf6a9fada2ae98e19e2de5c07f6eac01e8cc108813

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a 'free generator / game hack'. The document body, though heavily obfuscated, contains references to game hacks and generators, reinforcing the lure. The presence of numerous PDF links suggests a link farm designed to distribute malicious content, potentially leading to exploit execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 6

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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.online/app/479516143/minecraft-multiplayer-free-game-hack In PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-link_GM406889139.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-com-robux_GM431946152.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/pubg-uc-link_GM1330123889.pdfIn PDF document text
- http://www.agasrestaurant.com/uploaded_files/userfiles/files/minecraft-mod-menu-apk_GM479516143.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_004_off00005268.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5268	24900 bytes
SHA-256: `625bc391a9c4435968703a6160572879e970a8a42734aa1c7ab03f880f95409e`
`font_01_sfnt_off00008b06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B06	18136 bytes
SHA-256: `22c65de64af2721f6fc37241b86838ece151de043079d0e804f5da14bd34918b`

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