PDF malware analysis — malicious · f658cea7d1aa5065

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 12:28:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 14439b9ad1912ce22d34fd8a869e4b33 SHA-1: d6551570e3880bdb778ff2b6c187a91a1d684d4a SHA-256: f658cea7d1aa5065be9ac9736832ee70902cdfac4808b8e957f0325ae741bc62

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'free generators' and 'game hacks'. The document body and heuristics indicate a lure to click these links, which likely leads to a malicious site or a download. The presence of a 'clipboard command execution lure' suggests an attempt to trick the user into executing commands, potentially to download and run a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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.online/app/431946152/real-robux-generator-2021-game-hack In PDF document text
- https://www.insol-europe.org/uploads/files/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/minecraft-education-free_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/robux-match_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/roblox-font-free_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/tiktok-free-template_GM835599320.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-robux-easy_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000554a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x554A	24744 bytes
SHA-256: `5968bbd933ef2aa846705244b21f60590c74f25a13f7845442f83b8870ce7c95`
`font_01_sfnt_off00008dff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DFF	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off00009b11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B11	18660 bytes
SHA-256: `34bafee9e9fa54cbec66c73e5c60b6b360676a94b3a9814b04b79417a2c6596e`

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