PDF malware analysis — malicious · 48cc4d982b01f7dd

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 12:59:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 02fa81e6a07fe0c105e8dfc3f1170de0 SHA-1: 5df1505c4525eb6a999bf251d1af482ffbb67db2 SHA-256: 48cc4d982b01f7dd515458a8008a689ebf091247d97bf6dfea6c2306cf391072

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

Heuristics 5

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.
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 http://netcdn.tw/app/406889139/wwwcoin-master-hack-game-download-game-hack PDF link annotation
- https://www.owlweb.co.uk/uploads/files/files/ban-and-kick-gui-hack-pastebin-roblox_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/how-to-get-free-robux-no-survery_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/how-to-hack-into-anyones-account-on-roblox_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/free-redeem-code-on-roblox_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/how-to-win-robux_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/roblox-mad-city-free-car-glitch-season-4_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/roblox-cheat-remove-hair_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/roblox-cheats-prison-life_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/dragon-egg-backpack-roblox-free_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/roblox-tycoon-simulator-cheat_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/how-to-hack-admin-on-flood-escape-on-roblox_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/hacks-de-roblox-para-jailbreak_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/claimrobux-net_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
`stream_002_off00002e5c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2E5C	22580 bytes
SHA-256: `cac4ba5da0775dd0cc63bec889bde5a737fcae2be363f8937529e3246a7a54b3`
`font_01_sfnt_off000060b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60B3	19040 bytes
SHA-256: `5d6d92bc86e4eabd8213e7cde02281e89b90155e041e4321562c6fe931876c9b`

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