PDF malware analysis — malicious · 2e87517fadafc242

MALICIOUS

PDF

31.0 KB Created: 2021-07-20 04:22:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 955f262158c74f259f76860d28934db7 SHA-1: 6234ec5b25162ad162105bef96c3ad1079b2d517 SHA-256: 2e87517fadafc242c2b13fb21c1b646ba169570a94d6d28921f8863d28a0ecaf

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game hacks or generators. The primary link, http://netcdn.tw/app/835599320/get-free-likes-on-tiktok-game-hack, is identified as a malicious redirector. The document body also contains other URLs pointing to potentially malicious PDF files, suggesting a chain of redirects or further malicious content delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9893

Heuristics 4

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.
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/835599320/get-free-likes-on-tiktok-game-hack In PDF document text
- http://behsanroshd.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
- http://behsanroshd.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- http://behsanroshd.com/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
- http://behsanroshd.com/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
- http://behsanroshd.com/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
- http://behsanroshd.com/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- http://behsanroshd.com/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- http://behsanroshd.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- http://behsanroshd.com/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://behsanroshd.com/images/how-to-get-free-robux-without-verification_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_off000029f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x29F1	21672 bytes
SHA-256: `4a2bda16c12b4d6c0f80b3eb6cb1ca8bfd1bd23190d5f6ebf8c1b96d60ce3903`
`font_01_sfnt_off0000596f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x596F	17456 bytes
SHA-256: `782ce757928ab8849be8d7d6232199a595fd3f8ee03de5cb15c7b9ee803e6cfd`

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