PDF malware analysis — malicious · cbc79c1aabed4f2c

MALICIOUS

PDF

35.2 KB Created: 2021-06-23 00:28:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 1f306dbe207441b030c9abb5bd1d2d87 SHA-1: d0b87d01ce7ea91787fdd416b28cd0934dac0f73 SHA-256: cbc79c1aabed4f2c2c40c6376168fd9b27600b5093af96ecab823d97b9816377

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.co/app/431946152/free-stuff-for-roblox-avatar-game-hack PDF link annotation
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-spending-real-money_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/i-sleep-roblox-hack-oh-shi_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/roblox-get-free-pants-and-shirts-2021_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://baligaoritour.com/new/public/ckfinder/userfiles/files/300-daily-free-spins-coin-master_GM406889139.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_off000031c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31C2	22776 bytes
SHA-256: `0bddeced9ee62758cd98c9a06a4bf89aa81117c679ecde99c53a5e4585efb035`
`font_01_sfnt_off000064b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64B3	19008 bytes
SHA-256: `8800347e1f633725958f50b0872309f5c27171421509e11af346373d1137b7c5`

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