PDF malware analysis — malicious · 51ba250992d91bb5

MALICIOUS

PDF

49.0 KB Created: 2021-06-03 06:00:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: e888455daa874aca26a6440693e58b26 SHA-1: e45012f5d50841fb0fc8fa7eb57e8066b38611e7 SHA-256: 51ba250992d91bb5033930e0230c0ad9bd3f7c9404989c682701ab55fadfaef4

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9796

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-hack-apk-download-2021-game-hack PDF link annotation
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/claim-roblox_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/minecraft-education-free_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-gift-card-generator_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
`stream_004_off000054fd.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x54FD	25088 bytes
SHA-256: `2d4dce2e18e01a79a77da7505b6ddc183c2014911e8de4ab2c12cfceec3e3746`
`font_01_sfnt_off00008ee2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EE2	3380 bytes
SHA-256: `1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57`
`font_02_sfnt_off00009acb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9ACB	18876 bytes
SHA-256: `d185c6cd3e49a2afee7ee12c234f8f1d1893ea96722679c453b335d0786e87d0`

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