PDF malware analysis — malicious · 0881d41c053a9c17

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 07:25:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 4521ff8513c1e4477edcede87381dcea SHA-1: df4b05117c470130d15c07ef28471f1ba5b64e82 SHA-256: 0881d41c053a9c173f4ffac4cd506d67117589f99d2a77cddfc2fb6dcec84b74

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a known malicious URL. The document body, though heavily obfuscated, contains references to 'game hack' and the malicious URL. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of embedded links and the lure suggest a phishing attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/anti-ban-and-kick-cheat-roblox-game-hack In PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/hack-master-coin-pc_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/pubg-uc-2021-free_GM1330123889.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/hacks-deathnote-roblox_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/com-roblox_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
- https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-coins-and-spins-hack_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_off00005298.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5298	26068 bytes
SHA-256: `a671065ea33daddd67e3e5602bf83d372ef6490ddbb18694c66c539cf3891944`
`font_01_sfnt_off00008ecc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ECC	18748 bytes
SHA-256: `9018e399b62f273276132ff9e856e1e610093ea692c6343b8a53aaccb60796b9`

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