PDF malware analysis — malicious · 7a7d5dcaafa009ee

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 21:49:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 3722c6eae84dd3137a480b9cddd44c16 SHA-1: 262044c3ba1c43fac5c7bff3a37269102b147976 SHA-256: 7a7d5dcaafa009eed4b4f5f7b0de40204c2626867c00a793bca2e5f7b2dd8ae4

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9980

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 http://netcdn.tw/app/431946152/lazy-blocks-com-free-robux-game-hack PDF link annotation
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-robux-offers_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/easy-way-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/roblox-online-free_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/free-candy-audio-roblox-id_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
- https://e-learning.man1wonosobo.online/__statics/gudangsoal/files/rbxcity-free-robux_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_off00003169.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3169	21936 bytes
SHA-256: `6faf793d0e63f03b522b25cdf31d264a5648ec1adc458212f4e61ebad7cfcd6b`
`font_01_sfnt_off000061f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61F0	19480 bytes
SHA-256: `674b1dcba2a8a832e9ac54cd79118fcf3184e21139ebd106ccb57401b5375b65`

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