PDF malware analysis — malicious · a55b7f3daced31cb

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 23:36:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 2560e20c9e7dab6168dad1a865f77e82 SHA-1: c3deafae7f34f89532e4cbf2d94a01779bad8fff SHA-256: a55b7f3daced31cb69cf5f7f358680ee8bdb29fcef1fcabf1cec75e073055800

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector URL. The document body, though partially corrupted, contains references to 'free generator / game hack' and the malicious URL, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/406889139/master-coin-free-spin-game-hack In PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/robloxian-roblox-hacks-robux_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-games-similar-to-roblox_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/tiktok-free-auto-hearts_GM835599320.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-robux-mod_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/best-free-hoodie-on-roblox_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/inspect-hack-for-robux_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/robux-hack-deutsch-pc_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/tlcharger-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/free-robux-com_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/how-get-free-follower-roblox_GM431946152.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.nationalmilklaboratories.co.uk/uploads/files/files/blox-pink-robux-free_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_off000031c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31C2	22324 bytes
SHA-256: `2bc3b7ec3cac4518fcfee8c304d62c3f1ab0362dd0e5d7c07c029d8a4f6a8c67`
`font_01_sfnt_off0000637b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x637B	18176 bytes
SHA-256: `e7ebdb51c22119da7989f291c4e1e79e43f48b2212e10ddb7071af0af135db83`

Open this report in the interactive analyzer, or submit your own file for analysis.