PDF malware analysis — malicious · 9a60aeef541cd56b

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 04:38:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: bdf9d0322211a4e541a0e0fdfb854a10 SHA-1: b4a0bb31bd161b91a7a472a0128fabb1059a6eec SHA-256: 9a60aeef541cd56bc3306f59b7675654f02c0c3885ea969d48bb5186e541fcb7

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9971

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.
Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL

PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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/431946152/free-robux-wheel-game-hack PDF link annotation
- http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdfPDF link annotation
- http://45.115.65.99/__statics/gudangsoal/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/app-master_GM406889139.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/give-free-robux_GM431946152.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/robux-earning-websites_GM431946152.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/robux-free-c_GM431946152.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- http://45.115.65.99/__statics/gudangsoal/files/free-girl-hair-roblox_GM431946152.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
`font_00_sfnt_off000048a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48A2	25220 bytes
SHA-256: `b32783a3a5b4645d6edd07302c0b20f11b100b5633089eb2c9df3d73f0e649a6`
`font_01_sfnt_off00008213.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8213	18452 bytes
SHA-256: `2e7982e98076b23ded81992615fd9156783bf43ce379c6908e3793bc8f10067b`

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