PDF malware analysis — malicious · aaaa33fccb88dd86

MALICIOUS

PDF

38.4 KB Created: 2021-05-10 14:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 2f3f3552b5c46266c62bfe9d25d4c596 SHA-1: 059ded9f65e9e90584a7c41d95fb82915d657545 SHA-256: aaaa33fccb88dd86c1f3324819e66656bae32af7beb43f050521f3e8091c6137

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to redirectors disguised as 'free Robux' or game hack generators, aiming to trick users into visiting malicious sites. It also displays a fake CAPTCHA, a common social engineering tactic to coerce users into clicking links or performing actions. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9524

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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 https://netcdn.xyz/app/431946152/roblox-pink-free-robux-game-hack In PDF document text
- http://www.agri-tech.com.au/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
- http://www.agri-tech.com.au/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://www.agri-tech.com.au/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.agri-tech.com.au/images/hack-robux_GM431946152.pdfIn PDF document text
- http://www.agri-tech.com.au/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- http://www.agri-tech.com.au/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.agri-tech.com.au/images/free-coins-and-spins-in-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_off00003a06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3A06	25068 bytes
SHA-256: `e2915b5c373466f2c577cccddc157a2dd43fc2ec1adada3dc047f060d79825a5`
`font_01_sfnt_off000073fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73FB	18532 bytes
SHA-256: `62e9169d40109a3abf4bdf842601a34c83c90693a7fee2a3f682a11a81f7ba3a`

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