PDF malware analysis — malicious · 7a1b35b1d055f1d6

MALICIOUS

PDF

31.1 KB Created: 2021-07-19 22:51:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: dc3e1296b740c63cefea804252bea259 SHA-1: 8e7f151f6be4d035c8b990109a42af4565b8e8e2 SHA-256: 7a1b35b1d055f1d68b7295a65e366d1c2b5a407c3a7caa0bd9a4e8e0ea1cede8

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains multiple heuristics indicating it is malicious, specifically pointing to a redirector link that lures users with promises of 'game hacks' or 'generators'. The document body and embedded URLs reinforce this lure, directing users to potentially malicious sites. The ML classifier also flagged this PDF with high confidence.

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/479516143/best-free-minecraft-server-hosting-game-hack In PDF document text
- https://www.sensationboats.com/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
- https://www.sensationboats.com/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.sensationboats.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
- https://www.sensationboats.com/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.sensationboats.com/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.sensationboats.com/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
- https://www.sensationboats.com/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.sensationboats.com/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- https://www.sensationboats.com/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
- https://www.sensationboats.com/images/how-to-get-minecraft-bedrock-for-free_GM479516143.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_off00002917.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2917	21428 bytes
SHA-256: `cec55357080f32d0791fcb15857341df3880cf6455c6e051d95af9cbc80407bb`
`font_01_sfnt_off00005765.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5765	18328 bytes
SHA-256: `0b2d28431e5234c57104fb234e5f183f246f5a4819408a3d571d7ab08b18c1e5`

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