PDF malware analysis — malicious · 5da66aa3cde1d510

MALICIOUS

PDF

42.3 KB Created: 2021-04-24 16:50:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: d79c99f124c2ee28b4b9036d19bf008f SHA-1: 989e99e260033f814a5a7ba290616a2975e2b43c SHA-256: 5da66aa3cde1d510589707afbce8f307c434f0c941f05f808a3f00bbdcf576e6

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and accounts to entice users. It contains multiple links to known malicious redirector infrastructure, specifically pointing to 'netcdn.xyz', which is associated with distributing malware or phishing content. The document's structure and embedded links suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

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 https://netcdn.xyz/app/431946152/free-hacked-accounts-for-roblox-game-hack In PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/free-robux-hack-no-download-2021.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/how-to-get-free-robux-iphone-5.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/how-to-get-free-money-in-the-plaza-roblox.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/roblox-edit-money-value-cheat.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/google-roblox-free-stuff.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/free-robux-gift-card-codes-2021-no-human-verification.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/como-hackear-robux-en-roblox.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/how-to-get-limitless-free-robux-unpatched.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/free-robux-february-2021.pdfIn PDF document text
- http://srisaket.nfe.go.th/UserFiles/File/20210-robux-free.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
`stream_003_off00004424.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4424	27200 bytes
SHA-256: `a8d4b857087aa59f1e071e64e30b895b0ccd31f46883d5471ef0a9de1fa125ba`
`font_01_sfnt_off0000824c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x824C	18764 bytes
SHA-256: `a53d4d95dd15e50cf95d701acab45a1161b964233627673921130377dcfdfaa7`

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