PDF malware analysis — malicious · 6d84cfcf3f046da2

MALICIOUS

PDF

35.9 KB Created: 2021-06-26 13:50:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 4c8b99490466f26b7b3b34b596c797b8 SHA-1: 3c5fa5889040cb6373e301d0e00a0a1c8f95b0a3 SHA-256: 6d84cfcf3f046da23aca50cc12ba1654a07d2ee2811c6ece378636e43d88a1ff

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that impersonate Facebook and promise free Robux or game hacks, directing users to a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body and heuristics indicate a credential phishing or scam lure, likely leading to further malware download or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/pastebin-free-robux-hack-2021-game-hack.
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.co/app/431946152/pastebin-free-robux-hack-2021-game-hack In PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/minecraft-kill-aura_GM479516143.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-event-hack_GM406889139.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/what-is-a-free-robux-code_GM431946152.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/robux-adder_GM431946152.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/withdraw-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
- http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-hack-apk-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-daily-coin-master-coins_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
`font_00_sfnt_off00003405.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3405	22284 bytes
SHA-256: `0324c2a79f71e9edb3a409c1b8eed709fbe2cbff5e28b2b039f89f1799f17344`
`font_01_sfnt_off0000657d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x657D	19664 bytes
SHA-256: `875fb1f1d4e9973dedfea050b1a543b6ad6cb100f8982130c22dbb88e206b19a`

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