PDF malware analysis — malicious · 90fe7a55c9f15f47

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 15:48:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: c34de2a2edee0505f20b18e54ee165b3 SHA-1: 0b9a5b4061dcc31e7a14b533411c10dcc7a928b2 SHA-256: 90fe7a55c9f15f472048d5e18f9d1d87d3b604595de3065b6b2d40b8a3b376bd

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-confidence heuristic firing for linking to a game hack redirector, specifically for Coin Master. The embedded URL points to a site that likely hosts malicious content or further redirects. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the document's structure and embedded URI strongly suggest a phishing or social engineering attack aimed at tricking users into visiting a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9874

Heuristics 4

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 https://netcdn.online/app/406889139/coin-master-free-coins-and-spins-game-hack PDF link annotation
- https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/tiktok-free-hulu-account_GM835599320.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-tiktok-views_GM835599320.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/pokemon-go-free-spoofer_GM1094591345.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/earn-free-robux-on-roblox_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_004_off00004f9d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F9D	23888 bytes
SHA-256: `4eda2f059e08b2e40bc66c49fb2e5c9a5e6cdb92d8ad1a050d77b898523e274b`
`font_01_sfnt_off000085fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85FA	18060 bytes
SHA-256: `f77ee24e01944806ea28e16fd73427a54f7109e241804df06ce657d8c6d11cfb`

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