PDF malware analysis — malicious · 8eae7f1475580e80

MALICIOUS

PDF

46.3 KB Created: 2021-06-07 08:56:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 84c0efb1be290b41fb04d020afaabbc9 SHA-1: 69b659f774e066b04dd92ce16c256941f0ad2efd SHA-256: 8eae7f1475580e8083f0acb72be14c42e39b645f43e1f7963dc6d96ea3aed6c3

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, aiming to trick users into downloading further malware. The presence of a fake CAPTCHA heuristic further supports the social engineering aspect of this attack. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

Heuristics 6

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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/roblox-wins-hack-boxing-simulator-2-game-hack In PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/body-roblox_GM431946152.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/pokemon-go-free-647_GM1094591345.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
- http://perpus-untagsby.web.id/library-untagsby.web.id/repository/free-spin-coin-master-link-download_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_off00005149.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5149	26324 bytes
SHA-256: `3c4aaf50c173c5b78b600726d10587af9fc5c1a6804eef5e05dd452e5a489176`
`font_01_sfnt_off00008ee5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EE5	19416 bytes
SHA-256: `42521193113bc25b80ccec492286a80a197ba032c436f440b851542fa5c352e9`

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