PDF malware analysis — malicious · a528e4d9d6061a2c

MALICIOUS

PDF

39.0 KB Created: 2021-06-03 07:16:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 8d1c59d07f3fd64f782ee77c26d654cf SHA-1: d2c2ef3cf3323b9bd171771b6f5d51a6888e7cc7 SHA-256: a528e4d9d6061a2c5bef1283b9408070d3eb508293fea3a15d7c9f933af270b1

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary lure URL is https://netcdn.online/app/431946152/free-roblox-clothes-sites-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely intended to lead users to phishing or malware download sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9963

Heuristics 3

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.
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/431946152/free-roblox-clothes-sites-game-hack In PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-spin_GM406889139.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
- https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-free-coins-links-2021_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_004_off00005343.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5343	26064 bytes
SHA-256: `09e30e859335adf1363147645332c13718e8dca3293616cb7b50a3af36513f7e`
`font_01_sfnt_off00008e2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E2E	2824 bytes
SHA-256: `45bf821f81e84f4aa8d8374f492b182b36404f38b462c7dc471deaad6ab5c104`

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