PDF malware analysis — malicious · ef5e81c343e6c969

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 15:23:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: a5f04541326c6b4fe5b89811916fb322 SHA-1: aa808a1b3946949d040e0dd2894c11435c55cd99 SHA-256: ef5e81c343e6c9693c4950185a46ab2bd68b97888818791bd7dd07d032e499d4

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising game hacks and exploits for popular games like Roblox. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to malicious sites. No scripts were extracted, but the presence of malicious links and the lure content indicate a high likelihood of further malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

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/adopt-me-roblox-hacks-game-hack In PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/can-i-get-a-hacked-roblox-account-back-without-email_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/apocalypse-rising-hacks-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-shirt-template-size-free-shipping_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/is-there-any-way-to-gte-free-robux_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/breaking-point-tips-and-tricks-and-hacks-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/800-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-robux_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-phantom-forces-hack-level_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-hack-the-roblox-piano_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-generator-for-kids_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_off00002bd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2BD9	22644 bytes
SHA-256: `8d0679ac7be9e96d3c987c4b31174e01fc03a8371d7731ce6971e48ba909d13a`
`font_01_sfnt_off00005ea1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EA1	19308 bytes
SHA-256: `22934774863ac3be514f624650c183b4034f40a3033292b7237229c7ea0ab873`

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