PDF malware analysis — malicious · c7c4e9dd21768316

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 16:24:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 9d177817aa2721e24f44b6561a455534 SHA-1: 1c77c8f86af384ce81958169f4f2043ce0b84c29 SHA-256: c7c4e9dd2176831673be23f7f8f10d6e548eb8092277fb3bcb7ac48cddfd242a

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. The primary link, 'https://netcdn.online/app/406889139/coin-master-online-game-hack', is identified as a malicious redirector. The document's structure and content suggest a phishing or scam attempt, leveraging popular game themes to entice clicks. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirector workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9797

Heuristics 5

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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
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-online-game-hack In PDF document text
- https://www.andrology.co.uk/uploads/files/files/pokemon-go-free-raid-pass_GM1094591345.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/get-robux-now_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coins-master-hack_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-download_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-2021-no-human-verification_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_off000051f4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51F4	23904 bytes
SHA-256: `761fa2a7bca442c0626f8a8e8e9ed7a2bfef598fda4de32e68415ec07daa64e1`
`font_01_sfnt_off0000888f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x888F	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00009240.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9240	17620 bytes
SHA-256: `869d7695d274e208c7f4dfde8f160970e62420a8a3a2b9cf02de0f643df516c0`

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