PDF malware analysis — malicious · 27461992eae6c0dd

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 14:30:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: a8b6217d2faab946c3e119530b2db7b0 SHA-1: 9fd6f640a336144a70f08054bbf06bc55da13ecd SHA-256: 27461992eae6c0dd373b97642dfecc2ef80e3afd6284da654d581f3dc48326de

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains multiple embedded links that lead to known malicious redirectors and CAPTCHA-themed lures, often associated with game hacks or currency generators. The document body, though partially corrupted, contains URLs pointing to these deceptive sites. The ML classifier strongly indicates maliciousness, and the heuristics confirm the use of redirection and lure techniques.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE

PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
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 http://netcdn.tw/app/479516143/is-minecraft-java-edition-free-game-hack In PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/tycoon-cheats-roblox_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/roblox-pet-simulator-pet-hack_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-captcha_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/hack-coin-roblox_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/elemental-wars-hack-roblox-site-v3rmillionnet_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-robux-v3rmillion-site-v3rmillionnet_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/roblox-hack_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_off000034cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34CC	22608 bytes
SHA-256: `68dabda75e35408597d5be5e72ef4f52870394236e74f34e21664607971cf5d9`
`font_01_sfnt_off00006709.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6709	18452 bytes
SHA-256: `31a4a06d9fb355d17720bdbd4e924d787a36c109291985566279346bb5d94ffc`

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