PDF malware analysis — malicious · 5e68ca967a1aa66d

MALICIOUS

PDF

51.3 KB Created: 2021-05-16 20:34:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 2d32808e37ee46c19fa5f0715557a30c SHA-1: 5c8e504ed60d342452a8c76ebe90ab262bfe3117 SHA-256: 5e68ca967a1aa66d123d684be8707237c47de43901e2e5e276da9dece340159c

202 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 seed-phrase/secret-recovery 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 0.8646

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.
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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.xyz/app/406889139/20210-free-spin-links-for-coin-master-game-hack PDF link annotation
- https://www.modestuae.com/uploaded_files/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-game_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/roblox-tracker_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004b01.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B01	26040 bytes
SHA-256: `d84a28cb6919daf5cbcb1a208bd45034c13acf335eda8c0a86c9a5c76dba2c31`
`font_01_sfnt_off0000865e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x865E	8676 bytes
SHA-256: `e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468`
`font_02_sfnt_off00009ae9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9AE9	18456 bytes
SHA-256: `0c2189e6946270650e490ca98f5793093c0c1550cf94812332a81fc346291d18`
`font_03_sfnt_off0000bd7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBD7E	3264 bytes
SHA-256: `e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088`

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