PDF malware analysis — malicious · a02980046c5001eb

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 02:11:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: f11c456fbde7357586309493b14ffa78 SHA-1: 3cbb418236949726d43bd9323c2aa2708e595189 SHA-256: a02980046c5001ebdaa4662e63c07e2ecc4f5de96ede094a08f7e2e0e84ba18f

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that are identified as malicious redirectors, specifically targeting users with lures related to game hacks and free currency. The document body, though partially corrupted, contains similar URLs and text suggesting a scam. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

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/coin-master-free-coins-2021-game-hack In PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/how-to-prevent-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/hack-roblox-ccv3_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/roblox-character-cheat_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/roblox-hack-download-mega_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/free-shirt-creator-roblox_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/game-roblox-free-robux_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/vrbx-club-free-robux_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/free-roblox-accounts-2021-v3rmillion_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/transparent-muscles-roblox-free_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/free-robux-ad_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/free-robux-site_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.mentalhealthnow.co.uk/uploads/files/files/get-free-robux-today_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_off00003472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3472	23512 bytes
SHA-256: `fcff8e197cd87ee536fda207f563b3c5acb0b221d6e143078edd8bcc97fa8e3b`
`font_01_sfnt_off00006983.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6983	18400 bytes
SHA-256: `0cc69a54ece3ed14f72d45612a229cad946be49a09675100e3633ee455bac280`

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