PDF malware analysis — malicious · 9921ecde75d359ba

MALICIOUS

PDF

49.0 KB Created: 2021-05-18 01:05:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 4351c0a34c02bae0ad2ed2833c79d48d SHA-1: 55c162ec5bec4a65a249dd686df1f5846ffece9c SHA-256: 9921ecde75d359ba6a3123bad1688d2b4816cdbc47dd0fe55a0093dd11de33b7

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are SEO-optimized PDFs hosted on solararabialtd.com, and one direct link to netcdn.xyz. These links are presented as lures for game hacks and free spins, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9228

Heuristics 5

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.
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/coin-master-free-spins-link-today-new-game-hack PDF link annotation
- https://www.solararabialtd.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/free-minecraft-domain_GM479516143.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-picture_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_003_off00005034.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5034	29092 bytes
SHA-256: `2b94fad9c62b89b5661e1049d229bcc1b70de99bba0fdecb83ff2e273eaf2f8d`
`font_01_sfnt_off000092a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92A4	2812 bytes
SHA-256: `fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f`
`font_02_sfnt_off00009c44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C44	18572 bytes
SHA-256: `51c95658009ee6a6ae875a8d4133a79c51d36fbd34bac1203a2f2fe060da7c96`

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