PDF malware analysis — malicious · 38fd9ef4a90ad60e

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 17:58:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 819344d50e5be2bad7f071eb149a555b SHA-1: c887aaba01ae9301cd5becf289be159c3e65b629 SHA-256: 38fd9ef4a90ad60eebb10ac2bb0531a4f7207ff858e3af611b3431e01b684dec

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a common lure of free in-game items and hacks to trick users into clicking malicious links. The document contains multiple embedded URLs that point to redirectors and potentially malicious download sites, including a primary link to 'netcdn.co'. The ML classifier strongly flagged this PDF as malicious, and heuristic rules identified it as a game hack redirect lure and a link to known malicious infrastructure. No scripts were extracted, but the document's structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/roblox-free-generator-no-verification-no-survey-game-hack In PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/where-is-the-free-apartments-in-mad-city-roblox_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/free-redeem-robux-cards_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/roblox-exploit-executers-free_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/roblox-com-www_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/roblox-my-hero-academia-hack_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/free-girl-hair-in-roblox_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/serena-ryder-wild--free-id-roblox_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/robux-gives-roblox-hacks-free-roblox_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/roblox-anthem-hack-edition_GM431946152.pdfIn PDF document text
- http://www.sixtenlogistics.com/uploads/files/files/javascript-free-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
`font_00_sfnt_off00002f2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F2F	22400 bytes
SHA-256: `b1175c29306f1fab6ad5df4953b7669090fdf34d3acfb1e44de9f11170d2aa55`
`font_01_sfnt_off000060a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60A0	19444 bytes
SHA-256: `41f1c3d7d0c3db30a720323f14a9f260053411b84f186847adc0052345350fd7`

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