PDF malware analysis — malicious · fd39fdd72a5896c2

MALICIOUS

PDF

32.1 KB Created: 2021-07-22 07:23:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 3fe787ade1f6571ea28f7cfe17c0dd6d SHA-1: 7e93d74f76b2719059a6fd0909d2b1f98050faca SHA-256: fd39fdd72a5896c2a854be7a49426d6cffe93b4e77196f36f9a54236540415eb

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as free game hacks or generators. The document body and embedded URLs strongly suggest a lure for users to download potentially unwanted or malicious software. The presence of multiple redirector links indicates a deliberate attempt to obscure the final destination and distribute malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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/479516143/play-minecraft-pocket-edition-for-free-game-hack In PDF document text
- https://www.wannon.tw/upload/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.wannon.tw/upload/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.wannon.tw/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
- https://www.wannon.tw/upload/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/free-tiktok-app_GM835599320.pdfIn PDF document text
- https://www.wannon.tw/upload/files/minecraft-toys-for-free_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
`font_00_sfnt_off00002b61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2B61	21792 bytes
SHA-256: `01fcb1f3207ef9c00442edafa08b0a5a0884f8ad2840891a6a0cd3eb91daaf37`
`font_01_sfnt_off00005b16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B16	18460 bytes
SHA-256: `6c649d819020132e6c1bf6337a465c0b09cd39993cd953cd91e9ee42e31cc7d9`

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