PDF malware analysis — malicious · 438768496ed5e1fd

MALICIOUS

PDF

33.6 KB Created: 2021-07-24 02:43:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 60f124b8aa68d36715a5ad8f99874691 SHA-1: 0a8f33b6d36eff9f651f7341954a8d34b8bdf5d5 SHA-256: 438768496ed5e1fdb672c2d93e62a7ebe2771a989626429367b7baeb98047155

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body and embedded links strongly suggest a social engineering tactic to trick users into visiting malicious sites, likely for credential harvesting or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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/406889139/coin-master-free-spins-2021-game-hack In PDF document text
- https://lesvossolidarity.org/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://lesvossolidarity.org/images/give-me-free-robux_GM431946152.pdfIn PDF document text
- https://lesvossolidarity.org/images/minecraft-java-free_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://lesvossolidarity.org/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-tiktok-like_GM835599320.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-texture-packs-for-minecraft-pe_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
`stream_002_off00002c60.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2C60	23376 bytes
SHA-256: `09633fb4e6bf998b1cb279595a6be8989e7b06e76578189f45f5ea7c3c0847b2`
`font_01_sfnt_off00006128.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6128	18288 bytes
SHA-256: `9f7609fba99e53c6baa99bb04d1c7e3f9b7167131c1520eb2a413cdab4a14871`

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