PDF malware analysis — malicious · 1c614bfb2ad493b2

MALICIOUS

PDF

36.4 KB Created: 2021-05-20 18:45:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: f1f2a44c3d38999d3225ed3d4126228b SHA-1: bda1972256668cb1083396fe26ecacc6c1cbc609 SHA-256: 1c614bfb2ad493b2f2e9f7243e3ae168fbb503e5a5227e86086f1f1f0f6d5a96

208 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDF files, masquerading as generators for in-game currency or hacks. The document body and heuristics indicate a lure for free Robux or game hacks, with urgency language and a call-to-action button. The presence of multiple malicious links suggests an attempt to lead the user to a compromised site or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9492

Heuristics 6

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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/websites-that-give-you-free-robux-game-hack In PDF document text
- https://buanaabadii.com/ckfinder/userfiles/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
- https://buanaabadii.com/ckfinder/userfiles/files/free-robux-earn_GM431946152.pdfIn PDF document text
- https://buanaabadii.com/ckfinder/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
- https://buanaabadii.com/ckfinder/userfiles/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://buanaabadii.com/ckfinder/userfiles/files/free-roblox-accounts-2021-with-robux_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
`stream_002_off000030d9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x30D9	25864 bytes
SHA-256: `dc1f5c0da0a4dbeb794c9524ef92d1c87a3c8f676bd35d72fc05c0ccd1113f31`
`stream_003_off00006a65.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6A65	19108 bytes
SHA-256: `6861c41ba735d8f67874cff181a99ea6f9d656df5851b3483f669947649d93e1`

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