PDF malware analysis — malicious · d1d17b58e6eaeee7

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 15:20:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 557c6b4473c1e9c4c931da759cec66ee SHA-1: a9deca104764ebb4a31c93853c1cff7bee5afc33 SHA-256: d1d17b58e6eaeee727b5028c734abdd554863bd61c7fb6b8ba19fe50226ffde6

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are designed as link farms for SEO purposes, promoting game hacks and free item lures. One prominent URL, 'https://netcdn.online/app/479516143/minecraft-hacks-115-2-game-hack', is directly linked to a game hack lure. The document also exhibits characteristics of a remote support tool lure, suggesting a potential pretext for further compromise or malicious activity. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.
Remote-support tool lure high SE_REMOTE_SUPPORT_LURE

Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
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/479516143/minecraft-hacks-115-2-game-hack PDF link annotation
- https://www.themerchantshouse.co.uk/uploads/files/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/coinmaster-free-cards_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-daily-spins-coin-master_GM406889139.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/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
- https://www.themerchantshouse.co.uk/uploads/files/files/best-minecraft-hacked-client_GM479516143.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_off0000556c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x556C	25140 bytes
SHA-256: `223db221ccb1d4eaad85505dda3b618105e45b2dc67ed0cee212a64b1c17dd72`
`font_01_sfnt_off00008e6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E6F	18100 bytes
SHA-256: `3f652d3a864f4bac3832010aa8d262c76f48e547be63bb30313a41ce3d099ad1`

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