PDF malware analysis — malicious · c2f78c3eca53c5d9

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 00:22:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 4d578cba48c7f0bdcb923334b0cf54f2 SHA-1: 10284f34228dd094f64a65bbcd0cecd3ee6ea0d1 SHA-256: c2f78c3eca53c5d95e32aaa9f861526c018fb316b6bfe08fa30c30f6e2fbe32b

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators for popular games like Roblox and Minecraft. The primary lure appears to be a 'free generator / game hack' which is a common social engineering tactic to trick users into downloading malware or visiting phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirector workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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 http://netcdn.tw/app/431946152/roblox-redeem-card-codes-free-game-hack In PDF document text
- https://loba.com.vn/public/upload/files/instinct-online-roblox-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-synapse-x-download-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/body-building-roblox-weightlifting-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/script-for-free-admin-on-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/shirt-roblox-template-free-shipping_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-exploit-mega-nz-free-emperor-roblox-hack-mega-nz_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-into-a-full-server-on-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-cheat-indetectable_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hacks_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-admin-script-pastebin_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/good-hacks-to-do-with-a-hang-glider-roblox-treelands_GM431946152.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
`font_00_sfnt_off00002f5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F5C	22320 bytes
SHA-256: `7a770d0809b7967c10fabe46a30c1428eb2b0ace7c29f83716fa20ecb8f253c2`
`font_01_sfnt_off0000613a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x613A	19084 bytes
SHA-256: `83d93891039d5d6425f59be3dd68d42e34fb3560b963d7958afad9911eacf116`

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