PDF malware analysis — malicious · bdedd567b16c78d9

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 07:21:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: d81082299ebe8c1aec2b45e29b91e022 SHA-1: 80292e3b69f53e4e5e6c866382e6b6f1fb4ae8ef SHA-256: bdedd567b16c78d9729628dafd20ef37d50a9a2ade57d87774bbd8fb2898383f

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9804

Heuristics 6

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
PDF links to a 'free generator / game hack' redirector high 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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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
External URI info PDF_URI

PDF contains an external URL action
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.online/app/406889139/mcpe-master-hack-coin-apk-game-hack PDF link annotation
- https://www.nara.org.uk/uploads/files/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/roblox-jailbreak-auto-arrest-hack_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/clients-minecraft_GM479516143.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004ea2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4EA2	24432 bytes
SHA-256: `c870470d523d7b0495f9a40e5ed251153fa8b4be767fa1f9f4ac8320f7d1edb8`
`font_01_sfnt_off000084e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84E6	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00008e97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E97	17892 bytes
SHA-256: `93da02f41e67913bc0a94206f0ae171fc884c873a1823406ba79fdc99dac21fe`

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